FOR. Wetland Resources, Inc. Project # Prepared By: Wetland Resources, Inc th Avenue SE, Suite 106 Everett, WA (425)

Transcription

1 CONCEPTUAL ITIGATION PLAN FOR CALLIGAN CREEK HYDROELECTRIC PROJECT KING COUNTY, WA Wetland Resources, Inc. Project #1345 Prepared By: Wetland Resources, Inc th Avenue SE, Suite 16 Everett, WA 9828 (425) Prepared For: Public Utility District No. 1 of Snohomish County 232 California Street Everett, WA 9821 arch 12, 213

2 TABLE OF CONTENTS EXECUTIVE SUARY 1 SITE DESCRIPTION 2 PROJECT DESCRIPTION 2 ITIGATION 4 ITIGATION GOALS AND OBJECTIVES 7 WETLAND RESTORATION PLANTING PLAN 8 BUFFER RESTORATION PLANTING PLAN 8 PRESERVATION 9 PROJECT NOTES 9 PLANTING NOTES 1 TEPORARY EROSION AND SEDIENT CONTROL 13 AINTENANCE 13 PERFORANCE STANDARDS 15 PROJECT ONITORING 15 CONTINGENCY PLAN 16 USE OF THIS REPORT 16 REFERENCES 18 CONCEPTUAL ITIGATION AP SHEET 1/1 ATTACHENT A: DEBIT/CREDIT DATA ATTACHENT B: VICINITY APS ATTACHENT D: SIGN DETAIL

3 EXECUTIVE SUARY The purpose of this report is to provide a conceptual mitigation plan for temporary and permanent impacts related to the installation of the Calligan Creek Hydroelectric Project. This Snohomish County Public Utilities District No. 1 (PUD) hydroelectric project is located in the Calligan Creek basin, and upstream of the North Fork of the Snoqualmie River. Herrera Environmental Consultants prepared a Preliminary Critical Areas Report and Vegetation Assessment with addendum in February and September 212, which identified eleven wetlands and two streams (including Calligan Creek) within the project area. Detailed descriptions, ratings, and functions and values analysis of these wetlands and streams are provided in the Preliminary Critical Areas Report. Detailed descriptions, ratings, and functions and values analysis of these wetlands and streams are provided in the Preliminary Critical Areas Report and addendum in Appendix A of this report. The The discussion of wetlands, streams, buffers and all temporary and permanent impacts in this report is based on the information provided in the documents composed by Herrera Environmental Consultants. itigation Sequencing As part of the proposed Calligan Creek Hydroelectric project certain impacts are inherent in the design. In-stream work for the diversion is necessary to provide water for the downstream powerhouse. The penstock must run downslope from the intake to the powerhouse in a relatively direct alignment, and the powerhouse must be located near the stream channel for the tailrace to enter the stream system. Therefore the proposed impacts have been minimized to the greatest extent possible. In addition, the majority of the temporary impacts will take place in, or immediately adjacent to, existing logging roads or areas recently harvested through fairly intensive forestry activities. PUD will employ Best anagement Practices to minimize project impacts during construction. Project Impacts Unavoidable permanent impacts include: the intake and powerhouse facilities, roads, and the tailrace at the powerhouse. The total area of permanent impacts is acres. This includes.48 acres of wetland impact,.3 acres of stream impact, and 1.2 acres of buffer impact. Unavoidable temporary impacts include: clearing for construction, penstock area excavation and the laydown and spoils areas. These actions will impact the stream buffer, some wetland areas, and wetland buffers. The total area of temporary impacts is 7.23 acres, reduced by.27 acres from the original plan. The 7.23-acre impact includes.15 acres of wetland impact,.83 acres stream impact, and 6.79 acres of buffer impact. itigation easures itigation ratios for this project were determined using the debit/credit method developed by Washington State Department of Ecology and will be comprised of a Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 1 WRI # 1345

4 combination of: restoration of temporary impacts, preserving Category I and II wetlands and streams from future forest practice activities, and by providing additional buffer areas adjacent to Calligan Creek. This process is described in detail in the itigation section of this report. All temporary buffer impacts will be restored with grass and native shrubs. Permanent buffer impacts will be off-set by allocating additional buffer area in the vicinity of the impact. Temporary and permanent wetland and stream impacts will be offset by preserving stream, wetland and upland areas in the vicinity of the proposed project site. SITE DESCRIPTION The proposed project is located in the western foothills of the Cascade ountains along Hancock Creek, a tributary of the North Fork Snoqualmie River. Hancock Creek and the Snoqualmie River are located within the Snohomish River watershed or Watershed Resource Inventory Area 7 (WRIA 7). The proposed project site is further located in Sections 31 and 32, Township 25 North, Range 9 East, W. The section of Calligan Creek associated with the project flows from east to west out of Calligan Lake and continues west to join the North Fork Snoqualmie River. In general, the site has a moderate to steep westerly aspect sloping from the high level terrace including Calligan Lake to the North Fork Snoqualmie River. Calligan Creek flows out of Calligan Lake, enters a V-shaped gorge surrounded by steep slopes, and then moves into a gently sloping terrace and into the North Fork Snoqualmie River. The portion of the creek between Calligan Lake and the North Fork Snoqualmie River is 2.2 miles long. The proposed project site is located approximately nine miles northeast of North Bend on Hancock Forest anagement land. The site is accessible by public roads through the city of Snoqualmie and Hancock Forest anagement logging roads. Current access to the project area is restricted by locked gates. Hancock Forest anagement actively uses this area for timber production. Vegetation within the project site varies from recently cleared to second or third growth forest (logged about 1945, 197, and in 2s). Some were very recently logged, likely within the last year. PROJECT DESCRIPTION This project is part of a previously designed plan to construct and connect three hydropower projects including Black Creek, Hancock Creek, and Calligan Creek projects. The Black Creek project began operation in 1994 and is the only one of the three projects currently constructed. The proposed Calligan Creek Hydroelectric Project area is primarily north of Calligan Creek and generally parallel to the creek. The proposed intake structure/diversion weir is west of Calligan Lake and the powerhouse is near the confluence of Hancock Creek and North Fork Snoqualmie River. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 2 WRI # 1345

5 The total area of temporary impacts is 7.23 acres. The total area of permanent impacts is acres. The project elements and impacts are described below. Diversion Weir/Intake Structure The weir will be an ogee section, which will permit excess stream flow to pass through without obstruction. The reinforced concrete weir spillway will be 8 feet above the streambed and 45 feet wide. After construction, the diversion weir will have a small impoundment of approximately.4 acres of surface water area extending upstream from the weir for approximately 36 feet, at normal pool elevation (approximately 2,224 feet.) The intake structure will be 25 feet wide, 53 feet long, and 12 feet high. This structure will be located on the north bank and constructed from reinforced concrete with a trash rack, fish screens, and a closure gate. Water will first flow through the trash rack and then through Washington Department of Fish and Wildlife (WDFW) approved fish screens with a minimum total wetted area of 22 square feet, and into the penstock inlet. Penstock The penstock will be installed in a trench and then backfilled. Excavation for the upper portion of the penstock will require a maximum depth of 4 feet and the lower section will be installed in a fairly shallow trench. The penstock will consist of a 41-inch and 45- inch diameter and steel and/or high-density polyethylene pipe located on the north side of Hancock Creek between 5 and 25 feet from the stream. The total length of the penstock alignment between the intake structure and the powerhouse is 6,199 feet. Powerhouse The powerhouse will be constructed of reinforced concrete and will be about 48 feet wide, 6 feet long, and 4 feet tall. This structure will contain a two-jet horizontal Pelton turbine generator, auxiliaries, equipment, office and storage space. Tailrace The turbine discharge flow will be conveyed back to Calligan Creek in a riprap-lined channel approximately 12 feet wide. The tailrace will be constructed within the powerhouse footprint. Switchyard The step-up transformer will be located in a switchyard near the powerhouse. An impervious concrete secondary containment channel capable of containing accidental leakage from the transformer will surround it. The entire switchyard will be enclosed within a security fence. Transmission Line The transmission line will extend approximately 2.5 miles from the Calligan Creek switchyard to the existing switching vault near the lower Hancock Creek bridge on the transmission line alignment that extends south to the Black Creek Hydroelectric Project. The transmission line will consist of buried 34.5 kv power line along existing roads (North Ford County Road and Road #42). The transmission line will be installed in a Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 3 WRI # 1345

6 trench along the east side of the road and backfilled. This area lies entirely outside of all critical areas and their associated buffers. Lay-Down Area The lay-down area is a temporary area for staging during construction and to store spoils. This area lies entirely outside of all critical areas and their associated buffers. Access Roads and Bridge The majority of the site can be accessed using existing logging roads. Two new one-lane access road segments will be constructed between existing roads and the intake structure. Another segment will be constructed between an existing road and the powerhouse. The upper bridge over Calligan Creek is currently in disrepair and impassible to vehicles. This bridge will be replaced in its same location. ITIGATION itigation Sequencing The necessary mitigation sequencing required by King County Code (King County code 21.A ) and the Washington State Environmental Policy Act (SEPA) (Chapter 43-21C RCW) was employed. As part of the proposed Calligan Creek Hydroelectric project certain impacts are inherent in the design. In-stream work for the diversion is necessary to provide water for the downstream powerhouse. The penstock must run downslope from the intake to powerhouse in a relatively direct alignment and the powerhouse must be located near the stream channel for the discharge of hydrology to enter the stream system. Therefore the proposed impacts have been avoided to the greatest extent possible. In an effort to further avoid impacts, PUD attempted to change the location of the penstock alignment away from wetlands C5 and C7. This was not possible due to the underlying geology of the site. In order to reduce the proposed impacts an alternative plan for the penstock alignment was developed. The alternative plan reduces the maximum excavation depth for the penstock from 8 feet to 4 feet. This plan also reduces the overall temporary impacts within wetland and stream buffers and places all the laydown and spoils into an area outside of all sensitive areas and buffers. The majority of the temporary impacts will take place in or immediately adjacent to existing logging roads or areas recently harvested through fairly intensive forestry activities. PUD will employ Best anagement Practices to minimize project impacts during construction. Project Impacts The nature of run-of-the-river hydroelectric projects necessitates permanent impacts within the stream and any adjacent wetlands at the intake structure and powerhouse sites. Unavoidable permanent impacts include: the intake and powerhouse facilities, roads, and the tailrace at the powerhouse. The total area of permanent impacts is acres. This Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 4 WRI # 1345

7 includes.48 acres of wetland impact,.3 acres of stream impact, and 1.2 acres of buffer impact. Unavoidable temporary impacts include: clearing for construction, penstock area excavation and the laydown and spoils areas. These actions will impact the stream buffer, some wetland areas, and wetland buffers. The total area of temporary impacts is 7.23 acres, reduced by.63 acres from the original plan. The 7.23-acre impact includes.15 acres of wetland impact,.83 acres stream impact, and 6.79 acres of buffer impact. itigation easures itigation ratios for this project were determined using the credit/debit method developed by Washington State Department of Ecology and will be comprised of a combination of restoration of temporary impacts, preserving Category I and II wetlands and streams from future forest practice activities, and by providing additional buffer areas adjacent to Calligan Creek. This process is described in detail in the itigation section of this report. All temporary buffer impacts will be restored. Permanent buffer impacts will be off-set by allocating additional buffer area in the vicinity of the impact. Temporary and permanent wetland and stream impacts will be off-set by preserving stream, wetland and upland areas in the vicinity of the proposed project site. Table 1: Buffer Impacts Buffer Impacts Area (acres) itigation Ratio itigation Area (acres) Type of itigation Temporary : Restoration Permanent 1.2 2:1 2.4 Additional Buffer Table 2: Wetland Impacts Wetland Impacts Area (acres) itigation Ratio itigation Area (acres) Type of itigation Temporary.15 39: Restoration/ Preservation Permanent.48 >39:1 2. Preservation Table 3: Stream Impacts Stream Impacts Area (acres) itigation Ratio itigation Area (acres) Type of itigation Temporary.83 2:1.166 Restoration/ Preservation Permanent.3 >21:1.63 Preservation Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 5 WRI # 1345

8 Functions and Values The entire project area is on Hancock Forest anagement land and is currently used for commercial timber harvesting. Logging and clearing of land increases erosion and removes habitat from the area. Preservation of wetland features and their associated buffers within timber harvest areas will assist in decreasing overall temporal impacts associated with forest practice activities such as soil erosion and habitat loss. Providing preservation of upland areas near the streams will increase the habitat functions of the area. Ensuring dense, native vegetation remains in these areas will greatly increase all functions of the wetland. Preservation ensures wetland areas will continue to provide crucial water quality, hydrologic and habitat functions. A detailed description of the functions and values of the impacted area and the mitigation area is discussed in the itigation section of this report. All proposed impacts will be mitigated through a combination of: restoration of temporary impacts, preservation of high quality wetland, stream and buffer areas, and providing additional buffer area adjacent to Calligan Creek. Debit/Credit ethod Given the complexity of this proposed development activity in relationship to the surrounding landscape, ownership and ongoing forestry activities, WRI utilized the methodology established in the Washington State Department of Ecology Publication No , Calculating Credits and Debits for Compensatory itigation in Wetlands of Western Washington, Final Report, arch 212. This guidance provides a specific tool to determine if proposed mitigation will adequately mitigate for lost functions and values associated with impacts. Per KCC 21A , the department may enter into an agreement with an applicant to establish mitigation ratios to compensate for the adverse impacts to wetlands of the applicant s development proposal that differ from the ratios provided by KCC 21A B if: 1. The applicant demonstrates with scientifically valid data that the program implemented by the applicant has achieved long-term successes in reducing the risk of failure and temporal loss of function of the applicant s wetland mitigation; and 2. Implemented a scientifically rigorous mitigation, monitoring, and adaptive management program. Through the use of the debit/credit methodology (Scoring forms and summary table attached), the applicant has demonstrated that a combination of restoration of temporary impacts, and preservation of wetland, streams, and adjacent upland areas will directly compensate for the proposed wetland stream and buffer impacts. The following table provides a summary of the debit/credit analysis. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 6 WRI # 1345

9 Table 4 Debit/Credit Summary Table Debit (Impact) Credit (itigation) Net Increase Water Quality Acre-points Hydrologic Acre points Habitat Acre-points Note: Debit/Credits are summarized based on the total project impact/mitigation In addition, while there is no direct debit/credit analysis for stream impact, the applicant is proposing to preserve approximately 1, linear feet of stream channel currently flowing through Wetland C1 and discharging directly to the North Fork of the Snoqualmie River. The uppermost portion of this wetland, stream and associated buffer were logged as part of recent forest practices, indicating that preservation will provide a significant benefit to this system. Functions and Values Analysis Wetland C1 is a Category I wetland riverine wetland. This wetland has high potential to provide hydrologic functions including overbank storage. Overbank storage is important in reducing flooding and erosion threats to properties downstream. The dense vegetation in C1 creates the potential for C1 to perform a bio-filtraton function and erosion control. C1 also has a low level of invasive species, high level of special habitat features, and multiple hydroperiods. These characteristics create the potential for this wetland to provide a high habitat function. The entire project site and vicinity is heavily managed timber harvest land. Vegetation within this area varies from recently cleared to second and third succession forest. The segmentation of vegetation communities inhibits the ability of the area to provide corridors between critical areas in the vicinity. Removal of vegetation increases erosion and sediment loads in the streams present within the harvest area. Third succession forest may be providing habitat features and erosion control, but these are not permanent features since that area will be harvested in the future. By preserving a Category I wetland and buffer, this mitigation plan will enhance the functions and values of the surrounding area by providing quality habitat and stormwater storage, which will increase the water quality of the vicinity. ITIGATION GOALS AND OBJECTIVES Goals 1. Restore 6.79 acres of temporarily impacted buffer to their pre-impact functions and values. 2. Preserve 7.85 acres of wetland and 44.8 acres of upland areas. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 7 WRI # 1345

10 Objectives 1. Establish a functioning native vegetation community within the temporary impact areas similar to the surrounding undisturbed portions of the site. 2. To maintain and eventually increase hydrologic, water quality, and habitat functions and values within the surrounding basin over post-harvest conditions. Performance Standards 1. The wetland and buffer restoration areas shall support a minimum of 8% of the native plants set forth in the approved mitigation plan by the end of five years. 2. No more than 1% invasive species, including Class A noxious weeds shall be present within the restoration areas by the end of five years. 3. Critical Areas signs shall be intact and in good condition at the end of five years. WETLAND RESTORATION PLANTING PLAN During the excavation of the penstock trench, wetland soils will be stockpiled separately. Wetland restoration will be accomplished by returning the soil to roughly its original structure, planting shallow rooted shrub species similar to what was found within these wetland areas prior to disturbance. Trees will not be planted within the temporary impact areas over the top of the penstock. In addition, given the potential seed source surrounding these impacts, a significant component of native regeneration is expected to occur. A total of.15 acres of temporary wetland impacts will be planted with the following: Common Name Latin Name Size Spacing Quantity Salmonberry Rubus spectabilis 1 gal 5 ft 131 Twinberry Lonicera involucrata 1 gal 5 ft 13 Slough sedge Carex obnupta sprig 1.5 ft 2,9 All bare ground within the areas of wetland disturbance shall be seeded to the certified grass seed mixtures below. Similar native seed mixes are acceptable, upon approval of the consulting professional. Fertilizer shall not be used unless absolutely necessary. If deemed necessary by the consulting professional and/or the County representative, an appropriate fertilizer shall be applied. Wetland Seed ixture Common Name Latin Name lbs/1, s.f. Fowl meadowgrass Poa palustris.8 eadow foxtail Alopecurus pratensis.8 BUFFER RESTORATION PLANTING PLAN All temporary impacts will be restored by returning soil to its approximate horizon, planting shrubs, and seeding any open areas within the project area. The proposed mitigation plan to restore the temporary impacts and designate additional upland for preservation provides a 2:1 ratio of mitigation area to impacted area. Due to the large Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 8 WRI # 1345

11 seed source and presence of native volunteers in the area the density of the shrubs planted has been decreased from the 5-foot on center standard. A total of 6.79 acres of temporary buffer impacts will be planted with the following: Common Name Latin Name Size Spacing Quantity Red elderberry Sambucus racemosa 1 gal 9 ft 5 Salmonberry Rubus spectabilis 1 gal 9 ft 1,525 Snowberry Symphoricarpos albus 1 gal 9 ft 1,524 All bare ground within the areas of buffer disturbance shall be seeded to the certified grass seed mixtures below. Similar native seed mixes are acceptable, upon approval of the consulting professional. Fertilizer shall not be used unless absolutely necessary. If deemed necessary by the consulting professional and/or the County representative, an appropriate fertilizer shall be applied. Buffer Grass Seed ixture Common Name Latin Name lbs/1, s.f. Tall fescue Festuca arundinacea.4 Colonial bentgrass Agrostis tenuis.4 Annual ryegrass Lolium multiflorum.5 White clover Trifolium repens.2 PRESERVATION All of Wetland C1 and the majority of its associated buffer will be preserved. This is a total of 7.85 acres of wetland and 44.8 acres of buffer. Wetland C1 is a riverine wetland and therefore 1, linear feet of associated stream will be included in the preservation area. Critical area signs shall be installed around the entire preservation area (see attached detail). Due to the majority of this area being unharvested, the large seed source and native volunteers present in this area, no additional plantings will take place within the preservation area. PROJECT NOTES Pre-Construction eeting There will be a pre-construction meeting on this site between the applicant, the consulting biological professional, landscaper(s), and a King County representative. The objective will be to verify the location of the mitigation areas and to discuss project sequencing. Inspections A biological consultant shall be contracted to periodically inspect the mitigation measures described in this plan. inor adjustments to the original designs may be necessary prior to and during construction due to unusual or hidden site conditions. A King County Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 9 WRI # 1345

12 representative and/or the consulting biologist will make these decisions during construction. Construction Timing and Sequencing All mitigation plantings shall take place in early spring or late fall. PLANTING NOTES Plant in the early spring or late fall and order all plants from a reputable nursery. Care and handling of all plant materials is extremely important to the overall success of the project. The origin of all plant materials specified in this plan shall be native plants, nursery grown in the Puget Sound region of Washington. Pre-dug plants may only be used upon approval by the King County Department of Development and Environmental Services (DDES) Environmental Scientist. Some limited species substitution may be allowed, only with the agreement of the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Larger plant stock may be used without consultation. Substitutions with smaller plant stock than specified may require consultation. Handling Plants shall be handled so as to avoid all damage, including breaking, bruising, root damage, sunburn, drying, freezing or other injury. Plants must be covered during transport. Plants shall not be bound with wire or rope in a manner that could damage branches. Protect plant roots with shade and wet soil in the time period between delivery and installation. Do not lift container stock by trunks, stems, or tops. Do not remove from containers until ready to plant. Water all plants as necessary to keep moisture levels appropriate to the species horticultural requirements. Plants shall not be allowed to dry out. All plants shall be watered thoroughly immediately upon installation. Soak all containerized plants thoroughly prior to installation. Bare root plants are subject to the following special requirements, and shall not be used unless planted between November 1 and arch 1, and only with the permission of the Landscape Designer and King County DDES Environmental Scientist. Bare root plants must have enough fibrous root to ensure plant survival. Roots must be covered at all times with mud and/or wet straw, moss, or other suitable packing material until time of installation. Plants whose roots have dried out from exposure will not be accepted at installation inspection. Storage Plants stored by the Permittee for longer than one month prior to planting shall be planted in nursery rows, and treated in a manner suitable to that species horticultural requirements. Plants must be re-inspected by the Wetland Biologist and / or Landscape Designer prior to installation. Damaged Plants Damaged, dried out, or otherwise mishandled plants will be rejected at installation inspection. All rejected plants shall be immediately removed from the site. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 1 WRI # 1345

13 Plant Names Plant names shall comply with those generally accepted in the native plant nursery trade. Any question regarding plant species or variety shall be referred to the Landscape Designer, Wetland Biologist or King County DDES Environmental Scientist. All plant materials shall be true to species and variety and legibly tagged. Quality and condition Plants shall be normal in pattern of growth, healthy, well-branched, vigorous, with welldeveloped root systems, and free of pests and diseases. Damaged, diseased, pest-infested, scraped, bruised, dried out, burned, broken, or defective plants will be rejected. Plants with pruning wounds over 1" in diameter will be rejected. Roots All plants shall be balled and burlapped or containerized, unless explicitly authorized by the Landscape Designer and / or Wetland Biologist. Rootbound plants or B&B plants with damaged, cracked or loose rootballs (major damage) will be rejected. Immediately before installation, plants with minor root damage (some broken and / or twisted roots) must be root-pruned. atted or circling roots of containerized plantings must be pruned or straightened and the sides of the root ball must be roughened from top to bottom to a depth of approximately half an inch in two to four places. Bare root planting of woody material is allowed only with permission from the Landscape Designer, Wetland Biologist and / or King County DDES Environmental Scientist. Sizes Plant sizes shall be the size indicated in the plant schedule in approved plans. Larger stock may be acceptable provided that it has not been cut back to size specified, and that the root ball is proportionate to the size of the plant. Smaller stock may be acceptable, and under some circumstances preferable, based on site-specific conditions. easurements, caliper, branching and balling and burlapping shall conform to the American Standard of Nursery Stock by the American Association of Nurserymen (latest edition). Form Evergreen trees, if used, shall have single trunks and symmetrical, well-developed form. Deciduous trees shall be single-trunked unless specified as multi-stem in the plan schedule. Shrubs shall have multiple stems and be well branched. Timing of Planting To the greatest extent possible, all planting shall occur between November 1 and arch 1. Overall, the earlier plants go into the ground during the dormant period, the more time they have to adapt to the site and extend their root systems before the water demands of spring and summer. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 11 WRI # 1345

14 Weeding Existing and exotic vegetation in the mitigation and buffer areas will be hand weeded from around all newly installed plants at the time of installation and on a routine basis throughout the monitoring period. No chemical control of vegetation on any portion of the site is allowed without the written permission of King County DDES Environmental Scientist. Site Conditions The contractor shall immediately notify the Landscape Designer and / or Wetland Biologist of drainage or soil conditions likely to be detrimental to the growth or survival of plants. Planting operations shall not be conducted under the following conditions: freezing weather, when the ground is frozen, excessively wet weather, excessively windy weather, or in excessive heat. Planting Pits Planting pits shall be circular or square with vertical sides, and shall be 6 deeper and 12 larger in diameter than the root ball of the plant. Break up the sides of the pit in compacted soils. Set plants upright in pits, as illustrated in planting detail. Burlap shall be removed from the planting pit. Backfill shall be worked back into holes such that air pockets are removed without adversely compacting down soils. Fertilizer Slow-release fertilizer may be used if pre-approved by the King County DDES Environmental Scientist. Fertilizers shall be applied only at the base of plantings underneath the required covering of mulch (that does not make contact with stems of the plants). No soil amendment or fertilizers will be placed in planting holes. Water Irrigation / Watering: Water shall be provided during the dry season (July 1 through October 15) for the first two years after installation to ensure plant survival and establishment. A temporary above ground irrigation system and/or water truck should provide water. Water should be applied at a rate of 1 inch of water twice per week for year 1 and 1 inch per week during year 2. Staking ost shrubs and many trees do not require any staking. If the plant can stand alone without staking in a moderate wind, do not use a stake. If the plant needs support, then strapping or webbing should be used as low as possible on the trunk to loosely brace the tree with two stakes (see Planting Detail). Do not brace the tree tightly or too high on the trunk. If the tree is unable to sway, it will further lose the ability to support itself. Do not use wire in a rubber hose for strapping as it exerts too much pressure on the bark. As soon as supporting the plant becomes unnecessary, remove the stakes. All stakes must be removed within two (2) years of installation. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 12 WRI # 1345

15 Plant Location Lath stakes (measuring 3 x2 x1/4 ) or suitable flagging material shall be placed next to or on each planting to assist in locating the plants while removing the competing non-native vegetation and to assist in locating the plants during the monitoring period. Arrangement and Spacing The plants shall be arranged in a pattern with the appropriate numbers, sizes, species, and distribution that are required in accordance with the approved plans. The actual placement of individual plants shall mimic natural, asymmetric vegetation patterns found on similar undisturbed sites in the area. Spacing of the plantings may be adjusted to maintain existing vegetation with the agreement of the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Inspection(s) A biological professional shall be present on site to inspect the plants prior to planting. inor adjustments to the original design may be required prior to and during construction. TEPORARY EROSION AND SEDIENTATION CONTROL (TESC) Orange barrier fencing shall be placed around mitigation areas prior to construction. All sedimentation control facilities shall be kept in place and functioning until ground vegetation is firmly established and the project is complete. Prior to removal of TESC facilities, an inspection shall be required to be conducted by the King County DDES Environmental Scientist to verify that all accumulated sediment and debris that have been contained by TESC facilities have been removed, and the site stabilized. All upland areas of disturbance shall be seeded to a minimum of 1 pounds per acre of grass seed mix and all wetland areas of disturbance shall be seeded to a minimum of 96 pounds per acre of grass seed mix immediately upon completion of grading and planting. Seed mixes are specified in this plan. AINTENANCE The mitigation areas will require periodic maintenance to replace vegetation mortality as necessary. aintenance shall be required in accordance with King County Sensitive Areas Restoration Guidelines (22) and approved plans. aintenance may include, but not be limited to, removal of competing grasses (by hand if necessary), irrigation, fertilization (if necessary), replacement of plant mortality, and the replacement of mulch for each maintenance period. Chemical control, only if approved by DDES staff, shall be applied by a licensed applicator following all label instructions. Duration and Extent: In order to achieve performance standards, the Permittee shall have the mitigation area maintained for the duration of the monitoring period (three years). aintenance will include watering, weeding around the base of installed plants, Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 13 WRI # 1345

16 pruning, replacement, re-staking, removal of all classes of noxious weeds (see Washington State Noxious Weeds List, WAC ) and Himalayan blackberry, and any other measures needed to insure plant survival. The Landscape Designer and/or Wetland Biologist shall direct all maintenance. Survival: The Permittee shall be responsible for the health of 1% of all newly installed plants for one growing season after installation has been accepted by the King County DDES Environmental Scientist (see Performance Standards). A growing season for these purposes is defined as occurring from spring to spring (arch 15 to arch 15, of the following year). For fall installation (often required), the growing season will begin the following spring. The Permittee shall replace any plants that are failing, weak, defective in manner of growth, or dead during this growing season, as directed by the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Installation Timing for Replacement Plants: Replacement plants shall be installed between September 15 and January 15, unless otherwise determined by the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Standards for Replacement Plants: Replacement plants shall meet the same standards for size and type as those specified for the original installation unless otherwise directed by the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Replanting: Plants that have settled in their planting pits too deep, too shallow, loose, or crooked shall be replanted as directed by the Landscape Designer, Wetland Biologist, and/or King County DDES Environmental Scientist. Herbicides / Pesticides: Chemical controls shall not be used in the mitigation/restoration area, sensitive areas, or their buffers. However, limited use of herbicides may be approved depending on site-specific conditions, only if approved by King County DDES. Weeding: Trees and shrubs must be weeded to the dripline, and mulch maintained at 3" depth. Weed herbaceous plantings as necessary. Removal: All litter, dumping, and non-native vegetation (e.g., Himalayan blackberry, reed canarygrass, evergreen blackberry, Scotch broom, English ivy, morning glory, Japanese knotweed, etc.) must be removed and properly disposed of off-site. Receipts must be sent to DDES. Structures: Damaged or missing fences, posts, signs, habitat or hydrology structures must be repaired or replaced. Receipts must be sent to DDES. General: The Permittee shall include in general maintenance activities the replacement of any vandalized or damaged signs, habitat features, fences, or other structural components of this mitigation site. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 14 WRI # 1345

17 PERFORANCE STANDARDS Upon completion of the proposed mitigation project, an inspection by a wetland professional will be made to determine plan compliance. A compliance report will be supplied to King County within 3 days after the completion of planting. A landscape professional or biological scientist will do condition monitoring of the plantings in the fall, annually. A written report describing the monitoring results will be submitted to King County after each site inspection of each monitored year. Final inspection will occur five years after completion of this project. The contracted consultant will prepare a report as to the success of the project. Definition of Success: The wetland and buffer mitigation areas shall support at least 8% of the native plants set forth in the approved mitigation plan by the end of five years. The species mix should resemble that proposed in the planting plans, but strict adherence to obtaining all of the species shall not be a criterion for success. By the end of the fifth growing season, the percent areal coverage of native plants shall be 8% in the mitigation areas. PROJECT ONITORING Requirements for monitoring project: 1. Initial compliance report 2. Yearly site inspection (once per year in the fall) for five years 3. Annual reports including final report (one report submitted in the fall of each monitored year) Purpose for onitoring: The purpose for monitoring this mitigation project shall be to evaluate its success. Success will be determined if monitoring shows that at the end of five years, the definitions of success stated below are being met. The property owner shall grant access to the mitigation area for inspection and maintenance to the contracted landscape or wetland specialist and the King County biologist during the period of the bond or until the project is evaluated as successful. onitoring: onitoring shall be conducted annually for five years in accordance with the approved Restoration onitoring Plan. Vegetation onitoring: Sampling points or transects will be established for vegetation monitoring, and photo points established from which photos will be taken throughout the monitoring period. Permanent transect location(s) must be identified on the mitigation site plans in the first monitoring report (they may be drawn on approved mitigation plans by hand). Each transect shall detail herbaceous, shrub, and tree coverage in accordance with the King County Sensitive Areas Restoration Guidelines (22). onitoring of vegetation transects shall occur annually between ay 15 and September 3 (prior to leaf drop), unless otherwise specified. Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 15 WRI # 1345

18 Photo points: No less than four permanent photo points within the mitigation areas will be established. Photographs will be taken from these points to visually record condition of the restoration area. Photos shall be taken annually between ay 15 and September 3 (prior to leaf drop), unless otherwise specified. Report Contents: onitoring reports shall be submitted by October 31 of each year during the monitoring period. As applicable, monitoring reports must include descriptions / data for: a. Site plan and location map b. Historic description of project, including date of installation, current year of monitoring, restatement of mitigation / restoration goals, and performance standards c. Plant survival, vigor, and areal coverage for every plant community (transect data), and explanation of monitoring methodology in the context of assessing performance standards d. Site hydrology, including extent of inundation, saturation, depth to groundwater, function of any hydrologic structures, piezometer or staff gauge data if available, inputs, outlets, etc. e. Slope condition, site stability, any structures or special features f. Buffer conditions, e.g., surrounding land use, use by humans, and/or wild and domestic creatures g. Observed wildlife, including amphibian, avian, and others h. Assessment of nuisance / exotic biota and recommendations for management i. Soils, including texture, unsell color, rooting, and oxidized rhizospheres j. Receipts for any structural repair or replacement k. Color photographs (4 x 6 in size) taken from permanent photo-points as shown on onitoring Plan CONTINGENCY PLAN If there is a significant problem with the mitigation achieving its performance standard, Snohomish County PUD shall work with King County to develop a Contingency Plan. Contingency plans can include, but are not limited to: additional plant installation, erosion control, modifications to hydrology, and plant substitutions of type, size, quantity, and location. Such Contingency Plan shall be submitted to King County by December 31 of any year when deficiencies are discovered. USE OF THIS REPORT This Conceptual itigation Plan is supplied to Snohomish County PUD as a means of describing jurisdictional wetland conditions, as required by King County during the permitting process. This Conceptual itigation Plan may also be subject to change during the FERC licensing process and as specific details are worked out with the Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 16 WRI # 1345

19 landowner. This report is based largely on readily observable conditions and to a lesser extent, on readily ascertainable conditions. No attempt has been made to determine hidden or concealed conditions. Reports may be adversely affected due to the physical condition of the site and the difficulty of access, which may lead to observation or probing difficulties. The laws applicable to wetlands are subject to varying interpretations and may be changed at any time by the courts or legislative bodies. This report is intended to provide information deemed relevant in the applicant's attempt to comply with the laws now in effect. The work for this report has conformed to the standard of care employed by wetland ecologists. No other representation or warranty is made concerning the work or this report and any implied representation or warranty is disclaimed. Wetland Resources, Inc. eryl Kamowski Associate Ecologist Scott Brainard, PWS Principal Ecologist Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 17 WRI # 1345

20 REFERENCES Classification of Wetlands and Deepwater Habitats of the United States. FWS/OBS- 79/31. December U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Corps of Engineers Wetlands Delineation anual, Technical Report Y Environmental Laboratory. U.S. Army Engineer Waterway Experiment Station. Vicksburg, S. Hruby, T. 24. Washington State Wetland Rating System for Western Washington- Revised. Washington State Department of Ecology Publication # King County Zoning Code, Title 21A. King County, Washington. February 2. National List of Plant Species that Occur in Wetlands, Northwest Region U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Preliminary Critical Areas Report and Vegetation Assessment: Calligan Creek Hydroelectric Project, February 212. Herrera Environmental Consultants, Seattle, Washington. Preliminary Critical Areas Report and Vegetation Assessment Addendum: FERC No.P Calligan Creek Hydroelectric Project, September 212. Herrera Environmental Consultants, Seattle, Washington. Sheldon, D., T. Hruby, P. Johnson, K. Harper, A. cillan, T. Granger, S. Stanley, and E. Stockdale. 25. Wetlands in Washington State - Volume 1: A Synthesis of the Science. Washington State Department of Ecology. Publication # Olympia, WA. arch 25. Soil Survey of King County Area Washington. November U.S. Department of Agriculture, Soil Conservation Service. Washington, D.C. Washington State Wetlands Identification and Delineation anual. Washington State Department of Ecology. Publication # arch Conceptual itigation Plan Wetland Resources, Inc. Snohomish County PUD Calligan Creek 18 WRI # 1345

21 WETLAND C1 TO BE PRESERVED ACRES # C1 Legend Roa d 14 A # ADDITIONAL BUFFER AREA 1.5 ACRES C8 C9 CONCEPTUAL Figure E-1 (new). WETLAND PLAN AP in Wetlands and ITIGATION streams delineated CALLIGAN CREEK HYDROELECTRIC the study area for the Calligan Creek KING COUNTY, WA WRI # 1345 Hydroelectric Project in King County, FEBRUARY 28, 213 WA. Drawn By: SB Wetland C3 TEPORARY BUFFER IPACT 1.71 ACRES Wetland boundary Surveyed C7 Approximated # # Stream C6 No rth Fork # C2 # ea ie River Snoqualm PERANENT BUFFER IPACT.86 ACRES St r m OHW C4 Surveyed A Approximated C5 WETLAND IPACT.119 ACRES Wetland or stream buffer ADDITIONAL BUFFER AREAS 7.69 ACRES Original C3 Penstock alignment Laydown and spoils area # TEPORARY BUFFER IPACT C ACRES # # R1 WETLAND IPACT.3 ACRES Alternative C1a # Penstock alignment # # # # lligan Creek Ca # # Laydown and spoils area C1b # Common Penstock alignment C1a Powerhouse Intake North For k C ounty Road WETLAND IPACT.77 ACRES Transmission line PERANENT BUFFER IPACT.34 ACRES Deep excavation zone Legend Temporary Buffer Impact Permanent Buffer Impact Temporary Wetland Impact 3 6 1,2 Feet Additional Buffer Stream B Nort h For k C ount y Road Wetlands R3-R9 # R2 # TH AVE SE, SUITE 16 EVERETT, WA 9828 TEL: FAX: # Wetland Preservation Boundary of Preservation Area Impact and itigation Areas: Wetland Resources,Inc. (213) Wetland, Wetland boundaries, Stream and OHW: Herrera (211) Aerial: Snohomish County PUD (21) Produced By: GIS (rdr) Project: K:\Projects\ \Project\critical_areas\addendum\calligan-survey_v2.mxd (8/28/212)

22 ATTACHENT A: CREDIT/DEBIT DATA

23 Calculating Credits and Debits for Compensatory itigation in Wetlands of Western Washington Debit Worksheet (corrected 2/25/11) Project Calligan C7,C(1A,B, 2) C5 itigation Project is: Advanced Concurrent X Delayed Only fill in boxes that are highlighted. Use table for Temporal Loss Factors from the table below (Appendix E) Input Ratings for Functions from Scoring Sheet Wetland Unit Altered (#1) Wetland Unit Altered (#2) Wetland Unit Altered (#3) Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Site Potential (H,,L) L L Landscape Potential (H,,L) L H H L H Value (H,,L) L H L H L H Score for Wetland Unit Acres of non- forested areas impacted.11.8 Basic mitigation requirement (BR) Temporal loss factor (see below) DEBITS Acres of Deciduous forest impacted Basic mitigation requirement (BR) Temporal loss factor DEBITS Acres of Evergreen Forest impacted.8.9 Basic mitigation requirement (BR) Temporal loss factor (see below) DEBITS Acres of Cat. 1 Deciduous forest Basic mitigation requirement (BR) Temporal loss factor (see below) DEBITS Acres of Cat. 1 Evergreen forest Basic mitigation requirement (BR) Temporal loss factor (see below) DEBITS TOTALS Unit 1 Unit 2 Unit 3 Improving Water Quality Hydrologic Improving Water Quality Hydrologic Improving Water Quality Hydrologic Function Habitat Habitat Habitat Acre- points Improving Water Quality Hydrologic Total Debits by Function Habitat Acre- points Timing of itigation Advance At least two years has passed since plantings were completed or one year since as- built plans were submitted to regulatory agencies Concurrent Physical alterations at mitigation site are completed within a year of the impacts, but planting may be delayed by up to 2 years if needed to optimize conditions for success. For impacts to an emergent or shrub community For impacts to a deciduous forested wetland community For impacts to an evergreen forested wetland community For impacts to a deciduous Category I forested wetland community For impacts to an evergreen Category I forested wetland community Delayed - Construction is not completed within one year of impact, but is completed (including plantings if required) within 5 growing seasons of impact. For impacts to an emergent or shrub community For impacts to a deciduous forested wetland community For impacts to an evergreen forested wetland community For impacts to a deciduous Category I forested wetland community For impacts to an evergreen Category I forested wetland community Temporal Loss Factor

24 Calculating Credits and Debits for Compensatory itigation in Wetlands of Western Washington Credit Worksheet (corrected 2/25/11) Project Calligan C7,C(1A,B,2)C Only fill in boxes that are highlighted. Use table for Temporal Loss Factors from the table below (Appendix E) itigation Project is: Advanced Concurrent: X Input Ratings for Functions from Scoring Sheet. Score indicators assuming site will meet goals and objectives Site 1 Site 2 Site 3 Rating of Unit BEFORE mitigation Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Site Potential (H,,L) L L Landscape Potential (H,,L) L H H L H Value (H,,L) L H L H L H Score for Wetland Unit Site 1 Site 2 Site 3 Rating of Unit AFTER mitigation Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Improving Water Quality Hydrologic Habitat Site Potential (H,,L) L L Landscape Potential (H,,L) L H H L H Value (H,,L) L H L H L Score for Wetland Unit Acres created or re- established (aquatic bed, shrub, forest) Basic mitigation Credit Risk Factor (see below).9.9 CREDITS Acres created or re- established (emergent).11 Basic mitigation Credit Risk Factor (see below).9 CREDITS Acres rehabilitated or enhanced (aquatic bed, shrub, forest) Basic mitigation Credit Risk Factor (see below) CREDITS Acres rehabilitated or enhanced (emergent) Basic mitigation Credit Risk Factor (see below) CREDITS Acres of wetlands preserved Score for wetland functions from Scoring Sheet Sum of scaling factors ( Appendix E) CREDITS Acres of upland preserved 44.8 Habitat score for upland 7 7 Sum of scaling factors ( Appendix E).5.5 CREDITS TOTALS Site 1 Site 2 Site 3 Improving Water Quality Hydrologic Improving Water Quality Hydrologic Improving Water Quality Hydrologic Function Habitat Habitat Habitat Acre- points Total Credits by Function for Project Improving Water Quality Hydrologic Habitat Acre- points Type of itigation Risk Factors Advance mitigation The site meets criteria in Charts 1 and 3 of the site selection guidance [i.e. identified in a local plan and is sustainable] AND meets the criteria in Charts 4-11 for the appropriate functions. (Ecology publication # ) Advance means that at least two years has passed since plantings were completed or one year since as- built plans were submitted to regulatory agencies. Risk Factor Advance mitigation without meeting criteria in Ecology publication # Concurrent itigation itigation site meets criteria in Charts 1 and 3 of the site selection guidance [i.e. identified in a local plan and is sustainable] AND meets the criteria in Charts 4-11 for the appropriate functions. (All worksheets for Chart 3 and in Appendix D of Ecology publication # are submitted) Risk factor applies to all types of mitigation. itigation site chosen meets the criteria in Charts 2 and 3 of the site selection guidance [i.e. identified as a site with potential and that is sustainable] ; AND meets criteria in Charts 4-11 for the appropriate functions. (All worksheets for Chart 3 and in Appendix D of Ecology publication # are submitted) Risk factor applies to all types of mitigation. Site does not meet criteria in site selection guide, or guide was not used. Re- establishment, rehabilitation, or enhancement of an aquatic bed, shrub, or forest community Re- establishment, rehabilitation, or enhancement of an emergent community Creation of an aquatic bed, shrub, or forest community with data showing there is adequate water to maintain wetland conditions 5 years out of every 1. Creation of an emergent community with data showing there is adequate water to maintain wetland conditions 5 years out of every 1. Creation of an aquatic bed, shrub, or forest community without adequate hydrologic data. Creation of an emergent community without adequate hydrologic data

25 Wetland name or number C1a,b,C2 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): C1a,b,C2 - SITE 2 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E.85 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L Hydrologic Habitat H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

26 Wetland name or number C1a,b,C2 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

27 Wetland name or number C1a,b,C2 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

28 Wetland name or number C1a,b,C2 Riverine and Freshwater Tidal Fringe Wetlands WATER QUALITY FUNCTIONS - Indicators that site functions to improve water quality Questions R 1.1 R 1.2 are from the Wetland Rating System (Hruby 24b). R 1. Does the wetland unit have the potential to improve water quality? R 1.1 Area of surface depressions within the riverine wetland that can trap sediments during a flooding event: If depressions > ½ of area of unit draw polygons on aerial photo or map Depressions cover >3/4 area of wetland points = 8 Depressions cover > 1/2 area of wetland points = 4 Depressions present but cover < 1/2 area of wetland points = 2 No depressions present points = R 1.2 Characteristics of the plants in the unit (areas with >9% cover at person height): Include photo or map showing polygons of different plants types Trees or shrubs > 2/3 area of the unit points = 8 Trees or shrubs > 1/3 area of the unit points = 6 Herbaceous plants (> 6 high) > 2/3 area of unit points = 6 Herbaceous plants (> 6 high) > 1/3 area of unit points = 3 Trees, shrubs, and ungrazed herbaceous < 1/3 area of unit points = Total for R 1 Add the points in the boxes above Rating of Site Potential: If score is = H 6-11 = - 5 = L R 2. Does the landscape have the potential to support the water quality function at the site? R 2.1 Is the unit within an incorporated city or within its UGA? Yes = 2 No = R. 2.2 Does the contributing basin include a UGA or incorporated area? Yes = 1 No = R 2.3 Does at least 1% of the contributing basin contain tilled fields, pastures, or forests that have been clearcut within the last 5 years? Yes = 1 No = R 2.4 Is more than 1% of the area within 15 ft of the wetland unit in agricultural, pasture, golf courses, residential, commercial, or urban? Yes = 1 No = Figure 1 2 Figure Total for R 2 Add the points in the boxes above 1 Rating of Landscape Potential: If score is 3-5 = H 1 or 2 = = L Calculating Credits and Debits for itigation in Western WA Final Report arch 212 8

29 Wetland name or number C1a,b,C2 R 3. Is the water quality improvement provided by the site valuable to society? R 3.1 Is the unit along a stream or river that is on the 33(d) list or on a tributary that drains to one? Yes = 1 No = R 3.2 Does the river or stream have TDL limits for nutrients, toxics, or pathogens? Yes = 1 No = R 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? (answer YES if there is a TDL for the drainage in which unit is found) Yes = 2 No = Total for R 3 Add the points in the boxes above Rating of Value: If score is 2-4 = H 1 = = L L Riverine and Freshwater Tidal Fringe Wetlands HYDROLOGIC FUNCTIONS - Indicators that site functions to reduce flooding and stream erosion Questions R 4.1 and R 4.2 are from Wetland Rating System (Hruby 24b). R 4. Does the wetland unit have the potential to reduce flooding and erosion? R 4.1 Characteristics of the overbank storage the unit provides: Figure 3 Provide aerial photo showing average widths Estimate the average width of the wetland unit perpendicular to the direction of the flow and the width of the stream or river channel (distance between banks). Calculate the ratio: (average width of unit)/(average width of stream between banks). If the ratio is more than 2 points = 9 If the ratio is between 1 2 points = 6 If the ratio is between 5 - <1 points = 4 2 If the ratio is between 1 - <5 points = 2 If the ratio is < 1 points = 1 R 4.2 Characteristics of plants that slow down water velocities during floods: Treat large Figure woody debris as forest or shrub. Choose the points appropriate for the best description (polygons need to have >9% cover at person height NOT Cowardin classes): Provide photo or map showing polygons of different plants types 7 Forest or shrub for >1/3 area OR herbaceous plants > 2/3 area points = 7 Forest or shrub for > 1/1 area OR herbaceous plants > 1/3 area points = 4 Plants do not meet above criteria points = Total for R 4 Add the points in the boxes above Rating of Site Potential: If score is = H 6-11 = - 5 = L 9 Calculating Credits and Debits for itigation in Western WA Final Report arch 212 9

30 Wetland name or number C1a,b,C2 R 5. Does the landscape have the potential to support the hydrologic functions at the site? R5.1 Is the stream/river adjacent to the unit downcut? Yes = No = 1 R 5.2 Does the contributing basin include a UGA or incorporated area? Yes = 1 No = R 5.3 Is the upgradient stream or river controlled by dams? Yes = No = 1 Total for R 5 Rating of Landscape Potential: If score is Add the points in the boxes above 3 = H 1 or 2 = = L 1 1 R 6. Are the hydrologic functions provided by the site valuable to society? R 6.1 Distance to the nearest areas downstream that have flooding problems? Choose the description that best fits the site. The sub-basin immediately down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources. points = 2 Surface flooding problems are in a sub-basin further down-gradient. points = 1 1 No flooding problems anywhere downstream. points = R 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2 4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

31 Wetland name or number C1a,b,C2 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 2 Figure 2 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

32 Wetland name or number C1a,b,C2 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure 1 None = points Low = 1 point oderate = 2 points 2 [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 6 H 1. TOTAL Score - potential for providing habitat 13 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

33 Wetland name or number C1a,b,C2 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 53 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

34 Wetland name or number C5 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): Calligan C5 Pre SITE 3 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E 2.33 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L L L Hydrologic Habitat H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

35 Wetland name or number C5 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

36 Wetland name or number C5 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

37 Wetland name or number C5 Slope Wetlands WATER QUALITY FUNCTIONS - Indicators that the site functions to improve water quality Questions S 1.1 S 1.3 are from Wetland Rating System (Hruby 24b). S 1. Does the wetland unit have the potential to improve water quality? S 1.1 Characteristics of average slope of unit: (a 1% slope has a 1 ft vertical drop in elevation for every 1 ft horizontal distance) Slope is1% or less points = 3 Slope is 1% - 2% points = 2 Slope is 2% - 5% points = 1 Slope is greater than 5% points = S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS definitions) YES = 3 points NO = points S 1.3 Characteristics of the plants in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the plants in the wetland. Dense plants means you have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 inches. Provide photo or map showing polygons of different plants types Dense, uncut, herbaceous plants > 9% of the wetland area points = 6 Dense, uncut, herbaceous plants > ½ of area points = 3 Dense, woody, plants > ½ of area points = 2 Dense, uncut, herbaceous plants > ¼ of area points = 1 Does not meet any of the criteria above for plants points = Total for S 1 Add the points in the boxes above Rating of Site Potential: If score is 12 = H 6-11 = - 5 = L Figure 3 3 L S 2. Does the landscape have the potential to support the water quality function at the site? S 2.1 IS >1% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L L Calculating Credits and Debits for itigation in Western WA Final Report arch

38 Wetland name or number C5 S 3. Is the water quality improvement provided by the site valuable to society? S 3.1 Does the unit discharge directly to a stream, river, or lake that is on the 33(d) list? Yes = 1 No = S 3.2 Is the unit in a sub-basin where water quality is an issue? (at least one aquatic resource in the basin is on the 33(d) list) Yes = 1 No = S 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? Yes = 2 No = Total for D 3 Rating of Value: If score is 2-4 = H 1 = = L Add the points in the boxes above L Slope Wetlands HYDROLOGIC FUNCTIONS - Indicators that the site functions to reduce flooding and stream erosion Questions S 4.1 S 4.2 are from Wetland Rating System (Hruby 24b). S 4. Does the wetland unit have the potential to reduce flooding and stream erosion? S 4.1 Characteristics of plants that reduce the velocity of surface flows during storms. Choose the points appropriate for the description that best fit conditions in the wetland. (Stems of plants should be thick enough (usually > 1/8 in), or dense enough, to remain erect during surface flows) Dense, uncut, rigid plants covers > 9% of the area of the wetland. YES = 1 All other conditions = 1 Rating of Site Potential: If score is 1 = = L NOTES and FIELD OBSERVATIONS: Calculating Credits and Debits for itigation in Western WA Final Report arch

39 Wetland name or number C5 S 5. Does the landscape have the potential to support the hydrologic functions at the site? S 5.1 Is more than 25% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L S 6. Are the hydrologic functions provided by the site valuable to society? S 6.1 Distance to the nearest areas downstream that have flooding problems? Immediate sub-basin down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources points = 2 Surface flooding problems are in a sub-basin further down-gradient points = 1 1 No flooding problems anywhere downstream points = S 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2-4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

40 Wetland name or number C5 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 1 1 Figure 7 2 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = Calculating Credits and Debits for itigation in Western WA Final Report arch

41 Wetland name or number C5 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure None = points Low = 1 point oderate = 2 points 1 [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 4 H 1. TOTAL Score - potential for providing habitat 8 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

42 Wetland name or number C5 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 53 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

43 Wetland name or number C5 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): Calligan C5 Post - SITE 3 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E 2.33 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L L L Hydrologic Habitat H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

44 Wetland name or number C5 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

45 Wetland name or number C5 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

46 Wetland name or number C5 Slope Wetlands WATER QUALITY FUNCTIONS - Indicators that the site functions to improve water quality Questions S 1.1 S 1.3 are from Wetland Rating System (Hruby 24b). S 1. Does the wetland unit have the potential to improve water quality? S 1.1 Characteristics of average slope of unit: (a 1% slope has a 1 ft vertical drop in elevation for every 1 ft horizontal distance) Slope is1% or less points = 3 Slope is 1% - 2% points = 2 Slope is 2% - 5% points = 1 Slope is greater than 5% points = S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS definitions) YES = 3 points NO = points S 1.3 Characteristics of the plants in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the plants in the wetland. Dense plants means you have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 inches. Provide photo or map showing polygons of different plants types Dense, uncut, herbaceous plants > 9% of the wetland area points = 6 Dense, uncut, herbaceous plants > ½ of area points = 3 Dense, woody, plants > ½ of area points = 2 Dense, uncut, herbaceous plants > ¼ of area points = 1 Does not meet any of the criteria above for plants points = Total for S 1 Add the points in the boxes above Rating of Site Potential: If score is 12 = H 6-11 = - 5 = L Figure 3 3 L S 2. Does the landscape have the potential to support the water quality function at the site? S 2.1 IS >1% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L L Calculating Credits and Debits for itigation in Western WA Final Report arch

47 Wetland name or number C5 S 3. Is the water quality improvement provided by the site valuable to society? S 3.1 Does the unit discharge directly to a stream, river, or lake that is on the 33(d) list? Yes = 1 No = S 3.2 Is the unit in a sub-basin where water quality is an issue? (at least one aquatic resource in the basin is on the 33(d) list) Yes = 1 No = S 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? Yes = 2 No = Total for D 3 Rating of Value: If score is 2-4 = H 1 = = L Add the points in the boxes above L Slope Wetlands HYDROLOGIC FUNCTIONS - Indicators that the site functions to reduce flooding and stream erosion Questions S 4.1 S 4.2 are from Wetland Rating System (Hruby 24b). S 4. Does the wetland unit have the potential to reduce flooding and stream erosion? S 4.1 Characteristics of plants that reduce the velocity of surface flows during storms. Choose the points appropriate for the description that best fit conditions in the wetland. (Stems of plants should be thick enough (usually > 1/8 in), or dense enough, to remain erect during surface flows) Dense, uncut, rigid plants covers > 9% of the area of the wetland. YES = 1 All other conditions = 1 Rating of Site Potential: If score is 1 = = L NOTES and FIELD OBSERVATIONS: Calculating Credits and Debits for itigation in Western WA Final Report arch

48 Wetland name or number C5 S 5. Does the landscape have the potential to support the hydrologic functions at the site? S 5.1 Is more than 25% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L S 6. Are the hydrologic functions provided by the site valuable to society? S 6.1 Distance to the nearest areas downstream that have flooding problems? Immediate sub-basin down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources points = 2 Surface flooding problems are in a sub-basin further down-gradient points = 1 1 No flooding problems anywhere downstream points = S 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2-4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

49 Wetland name or number C5 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 1 1 Figure 7 2 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = Calculating Credits and Debits for itigation in Western WA Final Report arch

50 Wetland name or number C5 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure None = points Low = 1 point oderate = 2 points 1 [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 4 H 1. TOTAL Score - potential for providing habitat 8 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

51 Wetland name or number C5 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 53 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

52 Wetland name or number C7 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): C7 Pre-SITE 1 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E.2 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L L Hydrologic Habitat L H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

53 Wetland name or number C7 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

54 Wetland name or number C7 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

55 Wetland name or number C7 Slope Wetlands WATER QUALITY FUNCTIONS - Indicators that the site functions to improve water quality Questions S 1.1 S 1.3 are from Wetland Rating System (Hruby 24b). S 1. Does the wetland unit have the potential to improve water quality? S 1.1 Characteristics of average slope of unit: (a 1% slope has a 1 ft vertical drop in elevation for every 1 ft horizontal distance) Slope is1% or less points = 3 Slope is 1% - 2% points = 2 Slope is 2% - 5% points = 1 Slope is greater than 5% points = S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS definitions) YES = 3 points NO = points S 1.3 Characteristics of the plants in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the plants in the wetland. Dense plants means you have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 inches. Provide photo or map showing polygons of different plants types Dense, uncut, herbaceous plants > 9% of the wetland area points = 6 Dense, uncut, herbaceous plants > ½ of area points = 3 Dense, woody, plants > ½ of area points = 2 Dense, uncut, herbaceous plants > ¼ of area points = 1 Does not meet any of the criteria above for plants points = Total for S 1 Add the points in the boxes above Rating of Site Potential: If score is 12 = H 6-11 = - 5 = L 1 3 Figure S 2. Does the landscape have the potential to support the water quality function at the site? S 2.1 IS >1% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L L Calculating Credits and Debits for itigation in Western WA Final Report arch

56 Wetland name or number C7 S 3. Is the water quality improvement provided by the site valuable to society? S 3.1 Does the unit discharge directly to a stream, river, or lake that is on the 33(d) list? Yes = 1 No = S 3.2 Is the unit in a sub-basin where water quality is an issue? (at least one aquatic resource in the basin is on the 33(d) list) Yes = 1 No = S 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? Yes = 2 No = Total for D 3 Rating of Value: If score is 2-4 = H 1 = = L Add the points in the boxes above L Slope Wetlands HYDROLOGIC FUNCTIONS - Indicators that the site functions to reduce flooding and stream erosion Questions S 4.1 S 4.2 are from Wetland Rating System (Hruby 24b). S 4. Does the wetland unit have the potential to reduce flooding and stream erosion? S 4.1 Characteristics of plants that reduce the velocity of surface flows during storms. Choose the points appropriate for the description that best fit conditions in the wetland. (Stems of plants should be thick enough (usually > 1/8 in), or dense enough, to remain erect during surface flows) Dense, uncut, rigid plants covers > 9% of the area of the wetland. YES = 1 All other conditions = 1 Rating of Site Potential: If score is 1 = = L NOTES and FIELD OBSERVATIONS: Calculating Credits and Debits for itigation in Western WA Final Report arch

57 Wetland name or number C7 S 5. Does the landscape have the potential to support the hydrologic functions at the site? S 5.1 Is more than 25% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L S 6. Are the hydrologic functions provided by the site valuable to society? S 6.1 Distance to the nearest areas downstream that have flooding problems? Immediate sub-basin down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources points = 2 Surface flooding problems are in a sub-basin further down-gradient points = 1 1 No flooding problems anywhere downstream points = S 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2-4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

58 Wetland name or number C7 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 1 Figure 7 1 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

59 Wetland name or number C7 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure 1 None = points Low = 1 point oderate = 2 points [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 1 H 1. TOTAL Score - potential for providing habitat 3 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = L 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

60 Wetland name or number C7 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 53 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

61 Wetland name or number C7 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): C7 Post-SITE 1 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E.2 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L L Hydrologic Habitat L H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

62 Wetland name or number C7 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

63 Wetland name or number C7 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

64 Wetland name or number C7 Slope Wetlands WATER QUALITY FUNCTIONS - Indicators that the site functions to improve water quality Questions S 1.1 S 1.3 are from Wetland Rating System (Hruby 24b). S 1. Does the wetland unit have the potential to improve water quality? S 1.1 Characteristics of average slope of unit: (a 1% slope has a 1 ft vertical drop in elevation for every 1 ft horizontal distance) Slope is1% or less points = 3 Slope is 1% - 2% points = 2 Slope is 2% - 5% points = 1 Slope is greater than 5% points = S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS definitions) YES = 3 points NO = points S 1.3 Characteristics of the plants in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the plants in the wetland. Dense plants means you have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 inches. Provide photo or map showing polygons of different plants types Dense, uncut, herbaceous plants > 9% of the wetland area points = 6 Dense, uncut, herbaceous plants > ½ of area points = 3 Dense, woody, plants > ½ of area points = 2 Dense, uncut, herbaceous plants > ¼ of area points = 1 Does not meet any of the criteria above for plants points = Total for S 1 Add the points in the boxes above Rating of Site Potential: If score is 12 = H 6-11 = - 5 = L 1 3 Figure S 2. Does the landscape have the potential to support the water quality function at the site? S 2.1 IS >1% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L L Calculating Credits and Debits for itigation in Western WA Final Report arch

65 Wetland name or number C7 S 3. Is the water quality improvement provided by the site valuable to society? S 3.1 Does the unit discharge directly to a stream, river, or lake that is on the 33(d) list? Yes = 1 No = S 3.2 Is the unit in a sub-basin where water quality is an issue? (at least one aquatic resource in the basin is on the 33(d) list) Yes = 1 No = S 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? Yes = 2 No = Total for D 3 Rating of Value: If score is 2-4 = H 1 = = L Add the points in the boxes above L Slope Wetlands HYDROLOGIC FUNCTIONS - Indicators that the site functions to reduce flooding and stream erosion Questions S 4.1 S 4.2 are from Wetland Rating System (Hruby 24b). S 4. Does the wetland unit have the potential to reduce flooding and stream erosion? S 4.1 Characteristics of plants that reduce the velocity of surface flows during storms. Choose the points appropriate for the description that best fit conditions in the wetland. (Stems of plants should be thick enough (usually > 1/8 in), or dense enough, to remain erect during surface flows) Dense, uncut, rigid plants covers > 9% of the area of the wetland. YES = 1 All other conditions = 1 Rating of Site Potential: If score is 1 = = L NOTES and FIELD OBSERVATIONS: Calculating Credits and Debits for itigation in Western WA Final Report arch

66 Wetland name or number C7 S 5. Does the landscape have the potential to support the hydrologic functions at the site? S 5.1 Is more than 25% of the buffer area within 15 ft upslope of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = Rating of Landscape Potential: If score is 1 = = L S 6. Are the hydrologic functions provided by the site valuable to society? S 6.1 Distance to the nearest areas downstream that have flooding problems? Immediate sub-basin down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources points = 2 Surface flooding problems are in a sub-basin further down-gradient points = 1 1 No flooding problems anywhere downstream points = S 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2-4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

67 Wetland name or number C7 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 1 Figure 7 1 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

68 Wetland name or number C7 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure 1 None = points Low = 1 point oderate = 2 points [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 1 H 1. TOTAL Score - potential for providing habitat 3 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = L 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

69 Wetland name or number C7 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 53 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

70 Wetland name or number C1 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): C1 Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E.85 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality L Hydrologic H Habitat H H H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

71 Wetland name or number C1 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

72 Wetland name or number C1 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

73 Wetland name or number C1 Riverine and Freshwater Tidal Fringe Wetlands WATER QUALITY FUNCTIONS - Indicators that site functions to improve water quality Questions R 1.1 R 1.2 are from the Wetland Rating System (Hruby 24b). R 1. Does the wetland unit have the potential to improve water quality? R 1.1 Area of surface depressions within the riverine wetland that can trap sediments during a flooding event: If depressions > ½ of area of unit draw polygons on aerial photo or map Depressions cover >3/4 area of wetland points = 8 Depressions cover > 1/2 area of wetland points = 4 Depressions present but cover < 1/2 area of wetland points = 2 No depressions present points = R 1.2 Characteristics of the plants in the unit (areas with >9% cover at person height): Include photo or map showing polygons of different plants types Trees or shrubs > 2/3 area of the unit points = 8 Trees or shrubs > 1/3 area of the unit points = 6 Herbaceous plants (> 6 high) > 2/3 area of unit points = 6 Herbaceous plants (> 6 high) > 1/3 area of unit points = 3 Trees, shrubs, and ungrazed herbaceous < 1/3 area of unit points = Total for R 1 Add the points in the boxes above Rating of Site Potential: If score is = H 6-11 = - 5 = L R 2. Does the landscape have the potential to support the water quality function at the site? R 2.1 Is the unit within an incorporated city or within its UGA? Yes = 2 No = R. 2.2 Does the contributing basin include a UGA or incorporated area? Yes = 1 No = R 2.3 Does at least 1% of the contributing basin contain tilled fields, pastures, or forests that have been clearcut within the last 5 years? Yes = 1 No = R 2.4 Is more than 1% of the area within 15 ft of the wetland unit in agricultural, pasture, golf courses, residential, commercial, or urban? Yes = 1 No = Figure 1 2 Figure Total for R 2 Add the points in the boxes above 1 Rating of Landscape Potential: If score is 3-5 = H 1 or 2 = = L Calculating Credits and Debits for itigation in Western WA Final Report arch 212 8

74 Wetland name or number C1 R 3. Is the water quality improvement provided by the site valuable to society? R 3.1 Is the unit along a stream or river that is on the 33(d) list or on a tributary that drains to one? Yes = 1 No = R 3.2 Does the river or stream have TDL limits for nutrients, toxics, or pathogens? Yes = 1 No = R 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? (answer YES if there is a TDL for the drainage in which unit is found) Yes = 2 No = Total for R 3 Add the points in the boxes above Rating of Value: If score is 2-4 = H 1 = = L 1 1 L Riverine and Freshwater Tidal Fringe Wetlands HYDROLOGIC FUNCTIONS - Indicators that site functions to reduce flooding and stream erosion Questions R 4.1 and R 4.2 are from Wetland Rating System (Hruby 24b). R 4. Does the wetland unit have the potential to reduce flooding and erosion? R 4.1 Characteristics of the overbank storage the unit provides: Figure Provide aerial photo showing average widths Estimate the average width of the wetland unit perpendicular to the direction of the flow and the width of the stream or river channel (distance between banks). Calculate the ratio: (average width of unit)/(average width of stream between banks). If the ratio is more than 2 points = 9 If the ratio is between 1 2 points = 6 If the ratio is between 5 - <1 points = 4 9 If the ratio is between 1 - <5 points = 2 If the ratio is < 1 points = 1 R 4.2 Characteristics of plants that slow down water velocities during floods: Treat large Figure woody debris as forest or shrub. Choose the points appropriate for the best description (polygons need to have >9% cover at person height NOT Cowardin classes): Provide photo or map showing polygons of different plants types 7 Forest or shrub for >1/3 area OR herbaceous plants > 2/3 area points = 7 Forest or shrub for > 1/1 area OR herbaceous plants > 1/3 area points = 4 Plants do not meet above criteria points = Total for R 4 Add the points in the boxes above Rating of Site Potential: If score is = H 6-11 = - 5 = L 16 H Calculating Credits and Debits for itigation in Western WA Final Report arch 212 9

75 Wetland name or number C1 R 5. Does the landscape have the potential to support the hydrologic functions at the site? R5.1 Is the stream/river adjacent to the unit downcut? Yes = No = 1 R 5.2 Does the contributing basin include a UGA or incorporated area? Yes = 1 No = R 5.3 Is the upgradient stream or river controlled by dams? Yes = No = 1 Total for R 5 Rating of Landscape Potential: If score is Add the points in the boxes above 3 = H 1 or 2 = = L 1 1 R 6. Are the hydrologic functions provided by the site valuable to society? R 6.1 Distance to the nearest areas downstream that have flooding problems? Choose the description that best fits the site. The sub-basin immediately down-gradient of site has surface flooding problems that results in $$ loss or loss of natural resources. points = 2 Surface flooding problems are in a sub-basin further down-gradient. points = 1 1 No flooding problems anywhere downstream. points = R 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes = 2 No = Total for R 6 Add the points in the boxes above Rating of Value: NOTES and FIELD OBSERVATIONS: If score is 2 4 = H 1 = = L 1 Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

76 Wetland name or number C1 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 4 Figure 3 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = 2 Calculating Credits and Debits for itigation in Western WA Final Report arch

77 Wetland name or number C1 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure 1 None = points Low = 1 point oderate = 2 points 3 [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 6 H 1. TOTAL Score - potential for providing habitat 18 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = H 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

78 Wetland name or number C1 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 6 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 2 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L H Calculating Credits and Debits for itigation in Western WA Final Report arch

79 Wetland name or number C11 SCORING FOR Scoring functions to calculate mitigation credits and debits in Western Washington Name of wetland (if known): C11 Pre/Post Date of site visit: 2/26/13 Scored by SB SEC: TWNSHP: RNGE: Estimated size: These scores are for: Wetland being altered itigation site before mitigation takes place itigation site after goals and objectives are met SUARY OF SCORING Aerial photo included? 31 25N 9E.36 YES FUNCTION Rating of Site Potential Rating of Landscape Potential Rating of Value Score Based on Ratings (see table below) Improving Water Quality H H Hydrologic H Habitat H Wetland HG Class Used for Rating Depressional Riverine Lake-fringe Slope Flats Freshwater Tidal Check if unit has multiple HG classes present Scores (Order of ratings is not important) 9 = H,H,H 8 = H,H, 7 = H,H,L 7 = H,, 6 = H,,L 6 =,, 5 = H,L,L 5 =,,L 4 =,L,L 3 = L,L,L NOTE: Form is not complete without the figures requested. Put only the highest score for a question in each box of the form, even if more than one indicator applies to the unit. Do NOT add the scores within a question. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 1

80 Wetland name or number C11 HG Classification of Wetlands in Western Washington For questions 1-7 the criteria described must apply to the entire unit being rated. If the hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit with multiple HG classes. In this case, identify which hydrologic criteria in questions 1-7 apply, and go to Question Are the water levels in the entire unit usually controlled by tides (i.e., except during floods)? NO go to 2 YES the wetland class is Tidal Fringe go to Is the salinity of the water during periods of annual low flow below.5 ppt (parts per thousand)? YES Freshwater Tidal Fringe NO Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is Saltwater Tidal Fringe it is an Estuarine wetland and not scored. This method cannot be used for estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>9%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO go to 3 YES The wetland class is Flats If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface) at least 2 acres (8 ha) in size; At least 3% of the open water area is deeper than 6.6 ft (2 m)? NO go to 4 YES The wetland class is Lake-fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? The wetland is on a slope (slope can be very gradual), The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). NO - go to 5 YES The wetland class is Slope 5. Does the entire wetland unit meet all of the following criteria? The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river The overbank flooding occurs at least once every two years. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 2

81 Wetland name or number C11 NOTE: The riverine unit can contain depressions that are filled with water when the river is not flooding. NO - go to 6 YES The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time during the year? This means that any outlet, if present, is higher than the interior of the wetland. NO go to 7 YES The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO go to 8 YES The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HG classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HG classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 1% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less than 1% of the unit; classify the wetland using the class that represents more than 9% of the total area. HG Classes Within the Wetland Unit Being Rated Slope + Riverine Slope + Depressional Slope + Lake-fringe Depressional + Riverine along stream within boundary of depression Depressional + Lake-fringe Riverine + Lake-fringe Salt Water Tidal Fringe and any other class of freshwater wetland HG Class to Use in Rating Riverine Depressional Lake-fringe Depressional Depressional Riverine Treat as ESTUARINE If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2 HG classes within a wetland boundary, classify the wetland as Depressional for the rating. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 3

82 Wetland name or number C11 Depressional and Flats Wetlands WATER QUALITY FUNCTIONS - Indicators that the site functions to improve water quality. Questions D 1.1 D 1.4 are from the Wetland Rating System (Hruby 24b). D 1. Does the wetland unit have the potential to improve water quality? D 1.1 Characteristics of surface water flows out of the wetland: Figure 1 Provide photo or drawing Unit is a depression with no surface water leaving it (no outlet) points =3 Unit has an intermittently flowing, OR highly constricted permanently flowing outlet points = 2 Unit has an unconstricted, or slightly constricted, surface outlet (permanently 3 flowing) points = 1 Unit is a flat depression (Q. 7 on key), or in the Flats class, with permanent surface outflow and no obvious natural outlet and/or outlet is a man-made ditch points = 1 (If ditch is not permanently flowing treat unit as intermittently flowing ) D 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS definitions) YES: points = 4 NO: points = D 1.3 Characteristics of persistent plants (emergent, shrub, and/or forest Cowardin class Provide map of Cowardin plant classes Wetland has persistent, ungrazed, plants 95% of area points = 5 Wetland has persistent, ungrazed, plants 1/2 of area points = 3 Wetland has persistent, ungrazed plants 1/1 of area points = 1 Wetland has persistent, ungrazed plants <1/1 of area points = D 1.4 Characteristics of seasonal ponding or inundation. Provide map of hydroperiods This is the area of the wetland unit that is ponded for at least 2 months, but dries out sometime during the year. Do not count the area that is permanently ponded. Estimate area as the average condition 5 out of 1 yrs. Area seasonally ponded is > ½ total area of wetland points = 4 Area seasonally ponded is > ¼ total area of wetland points = 2 Area seasonally ponded is < ¼ total area of wetland points = Total for D 1 Rating of Site Potential: If score is NOTES and FIELD OBSERVATIONS: Add the points in the boxes above = H 6-11 = - 5 = L Figure 1 Figure H Calculating Credits and Debits for itigation in Western WA Final Report arch 212 4

83 Wetland name or number C11 D 2. Does the landscape have the potential to support the water quality function at the site? D 2.1 Does the Wetland unit receive stormwater discharges? Yes = 1 No = D 2.2 Is more than 1% of the area within 15 ft of wetland unit in agricultural, pasture, residential, commercial, or urban? Yes = 1 No = D 2.3 Are there septic systems within 25 ft of the wetland unit? Yes = 1 No = D 2.4 Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1 D 2.3? Source Yes = 1 No = Total for D 2 Add the points in the boxes above Rating of Landscape Potential: If score is 3 or 4 = H 1 or 2 = = L 1 1 D 3. Is the water quality improvement provided by the site valuable to society? D 3.1 Does the unit discharge directly to a stream, river, or lake that is on the 33d list? Yes = 1 No = D 3.2 Is the unit in a basin or sub-basin where an aquatic resource is on the 33(d) list? Yes = 1 No = 4 3 D 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality? (answer YES if there is a TDL for the basin in which unit is found) Yes = 2 No = Total for D 3 Rating of Value: NOTES and FIELD OBSERVATIONS: Add the points in the boxes above If score is 2-4 = H 1 = = L 3 1 H Recent logging activity creates the potential for silt to enter wetland. Calculating Credits and Debits for itigation in Western WA Final Report arch 212 5

84 Wetland name or number C11 Depressional and Flats Wetlands HYDROLOGIC FUNCTIONS - Indicators that the site functions to reduce flooding and stream degradation. Questions D 4.1 D 4.3 are from Wetland Rating System (Hruby 24b). D 4. Does the wetland unit have the potential to reduce flooding and erosion? D 4.1 Characteristics of surface water flows out of the wetland: Unit is a depression with no surface water leaving it (no outlet) points = 4 Unit has an intermittently flowing OR highly constricted permanently flowing outlet points = 2 Unit is a flat depression (Q. 7 on key), or in the Flats class, with permanent surface outflow and no obvious natural outlet and/or outlet is a man-made ditch points = 1 Unit has an unconstricted, or slightly constricted, surface outlet and is permanently flowing) points = (If ditch is not permanently flowing treat unit as intermittently flowing ) D 4.2 Depth of storage during wet periods Estimate the height of ponding above the bottom of the outlet. For units with no outlet measure from the surface of permanent water or deepest part (if dry). arks of ponding are 3 ft or more above the surface or bottom of outlet points = 7 The wetland is a headwater wetland points = 5 arks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 arks are at least.5 ft to < 2 ft from surface or bottom of outlet points = 3 Unit is flat (yes to Q. 2 or Q. 7 on key) but has small depressions on the surface that trap water points = 1 arks of ponding less than.5 ft points = D 4.3 Contribution of wetland unit to storage in the watershed Estimate the ratio of the area of upstream basin contributing surface water to the wetland to the area of the wetland unit itself. The area of the basin is less than 1 times the area of the unit points = 5 The area of the basin is 1 to 1 times the area of the unit points = 3 The area of the basin is more than 1 times the area of the unit points = Entire unit is in the FLATS class points = 5 Total for D 4 Rating of Site Potential: If score is NOTES and FIELD OBSERVATIONS: Add the points in the boxes above = H 6-11 = - 5 = L Calculating Credits and Debits for itigation in Western WA Final Report arch 212 6

85 Wetland name or number C11 D 5. Does the landscape have the potential to support hydrologic functions at the site? D 5.1 Does the unit receive any stormwater discharges? Yes = 1 No = D5.2 Is >1% of the land use within 15 ft of the wetland unit agriculture, pasture, residential, urban, or commercial? Yes = 1 No = D 5.3 Is more than 25% of the contributing basin of the wetland unit covered with intensive human land uses (residential at >1 residence/1 acre, urban, commercial, agriculture, etc.)? Yes = 1 No = Total for D 5 Add the points in the boxes above Rating of Landscape Potential: If score is 3 = H 1,2 = = L D 6. Are the hydrologic functions provided by the site valuable to society? D 6.1 The unit is in a landscape that has flooding problems. Choose the description that best matches conditions around the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met. The site has been identified as important for flood storage or flood conveyance in a regional flood control plan. points = 2 The wetland captures surface water that would otherwise flow downgradient into areas where flooding has damaged human or natural resources (e.g., salmon redds), AND o Damage occurs in sub-basin that is immediately down-gradient of unit. points = 2 o Damage occurs in a sub-basin further down-gradient. points = 1 Flooding from groundwater is an issue in the sub-basin. points = 1 The existing or potential outflow from the wetland is so constrained by human or natural conditions that the water stored by the wetland cannot reach areas that flood. Explain why points = There are no problems with flooding downstream of the unit. points = 2 Rating of Value: If score is 2 = H 1 = = L H NOTES and FIELD OBSERVATIONS: Calculating Credits and Debits for itigation in Western WA Final Report arch 212 7

86 Wetland name or number C11 These questions apply to wetlands of all HG classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat. Questions H 1.1 H 1.5 are from Wetland Rating System (Hruby 24b). H 1. Does the wetland unit have the potential to provide habitat for many species? H 1.1 Structure of plant community indicators are Cowardin classes and layers in forest Check the Cowardin plant classes in unit Polygons for each class must total ¼ acre, or more than 1% of the unit if it is smaller than 2.5 acres. Provide map of Cowardin plant classes Aquatic bed Emergent plants Scrub/shrub (areas where shrubs have > 3% cover) Forested (areas where trees have > 3% cover) If the unit has a forested class check if: The forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous, moss/ground-cover) that each cover 2% within the forested polygon Add the number of structures checked. If you have: 4 structures or more points = 4 3 structures points = 2 2 structures points = 1 1 structure points = H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 1% of the wetland or ¼ acre to count (see text for descriptions of hydroperiods). Provide map of polygons with different hydroperiods Permanently flooded or inundated 4 or more types present points = 3 Seasonally flooded or inundated 3 types present points = 2 Occasionally flooded or inundated 2 types present points = 1 Saturated only 1 type present points = Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake-fringe wetland = 2 points Freshwater tidal wetland = 2 points Figure 1 1 Figure 2 H 1.3. Richness of Plant Species Count the number of plant species in the wetland unit that cover at least 1 ft 2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian ilfoil, reed canarygrass, purple loosestrife, Canadian Thistle If you counted: > 19 species points = 2 List species below if you want to: 5-19 species points = 1 < 5 species points = 1 Calculating Credits and Debits for itigation in Western WA Final Report arch

87 Wetland name or number C11 H 1.4. Interspersion of habitats Decide from the diagrams below whether interspersion between Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Provide map of Cowardin plant classes (same as H1.1) Figure 1 None = points Low = 1 point oderate = 2 points 2 [riparian braided channels with 2 classes] High = 3 points NOTE: If you have four or more classes or three plants classes and open water the rating is always high. H 1.5. Special Habitat Features: Check the habitat features that are present in the wetland. The number of checks is the number of points you put into the next column. Large, downed, woody debris within the unit (>4 inches diameter and 6 ft long). Standing snags (diameter at the bottom > 4 inches) within the unit Undercut banks are present for at least 6.6 ft (2m) and/or overhanging plants extends at least 3.3 ft (1m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft (1m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (>3degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least ¼ acre of thin-stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated.(structures for egg-laying by amphibians) Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of strata) 3 H 1. TOTAL Score - potential for providing habitat 9 Add the scores from H 1.1, H 1.2, H 1.3, H 1.4, and H 1.5 Rating of Site Potential: If score is = H 7 14 = 6 = L Calculating Credits and Debits for itigation in Western WA Final Report arch

88 Wetland name or number C11 H 2. Does the landscape have the potential to support habitat at the site? H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit). 6 Calculate: % undisturbed habitat + [(% moderate and low intensity land uses)/2] = Provide map of land use within 1 km of unit edge If total accessible habitat is: > 1/3 (33.3%) of 1 km circle (~1 hectares or 25 acres) points = % of 1 km circle points = % of 1 km circle points = 1 <1% of 1 km circle points = H 2.2 Undisturbed habitat in 1 km circle around unit. If: Undisturbed habitat > 5% of circle points = 3 Undisturbed habitat 1-5% and in 1-3 patches points = 2 Undisturbed habitat 1-5% and > 3 patches points = 1 Undisturbed habitat < 1% of circle points = H 2.3 Land use intensity in 1 km circle. If: > 5% of circle is high intensity land use points = (- 2) Does not meet criterion above points = Total for H 2 Add the points in the boxes above Rating of Landscape Potential: If score is 4-6 = H 1-3 = < 1 = L Figure H H 3. Is the Habitat provided by the site valuable to society? H3.1Does the site provides habitat for species valued in laws, regulations or policies? (choose only the highest score) Site meets ANY of the following criteria: points = 2 It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) It is a priority area for an individual WDFW species It is a Natural Heritage Site as determined by the Department of Natural Resources It scores 4 on question H2.3 of the wetland rating system It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline aster Plan, or in a watershed plan 1 Site scores 1-3 on question H2.3 of the wetland rating system points = 1 Site does not meet any of the criteria above points = Rating of Value: If score is 2 = H 1 = = L Calculating Credits and Debits for itigation in Western WA Final Report arch

89 ATTACHENT B: VICINITY APS

90 FIGURE 1: REGIONAL VICINITY AP CALLIGAN CREEK HYDROPOWER PROJECT Sections 7 & 8, Township 24N, Range 9E, W.. Latitude: 47 34'14.42"N Longitude: '49.66"W NTS Calligan Creek Hydroelectric Site * FIGURE 1: REGIONAL VICINITY AP CALLIGAN CREEK HYDROELECTRIC KING COUNTY, WA WRI # 1345

91 FIGURE 2: LOCAL VICINITY AP CALLIGAN CREEK HYDROELECTRIC PROJECT Sections 7 & 8, Township 24N, Range 9E, W.. Latitude: 47 36'21.39"N Longitude: '35.62"W Calligan Creek Hydroelectric Project INTAKE LAKE HANCOCK Road 29 Tolt Reservoir Road Spur 1 Gate Road N. Fork Snoqualmie River NTS DRIVING DIRECTIONS: From Hwy 22 (Fall City-Snoqualmie Rd), approximately one mile north of the town of Snoqualmie turns onto Tokul Rd SE. Travel approximately 2.1 miles on Tokul Rd SE, which becomes 396th Drive SE, then turn north onto 42nd Ave SE and travel almost 5 miles up to Spur 1 Gate Road. 42nd Ave SE becomes Weyerhaeuser ainline Rd and then Tolt Reservoir Rd up to the intersection with Spur 1 Gate Road. Travel on Spur 1 Gate Rd for approximately 1.5 mile, crossing over the North Fork Snoqualmie River. On the east side of the River, take the first road turning north (Rd 29). Drive 1.9 miles north. The Calligan Creek Hydroelectric starts on the west side of the road. FIGURE 2: LOCAL VICINITY AP CALLIGAN CREEK HYDROELECTRIC KING COUNTY, WA WRI # 1345

92 ATTACHENT C: SIGN DETAIL

93 CRITICAL AREA SIGN INSTALLATION GUIDELINES NOT TO SCALE TYPE 1 SIGN TYPE 2 SIGN 5 ft. CRITICAL AREA THIS AREA IS PROTECTED TO PROVIDE WILDLIFE HABITAT AND AINTAIN CRITICAL AREA(S) FUNCTIONS/VALUES. PLEASE DO NOT DISTURB THIS VALUABLE RESOURCE CONSULT KING COUNTY FOR CRITICAL AREA RESTRICTIONS 12"x 18" Aluminum sign with white reflective background. Install one per protected feature in a conspicuous place. inimum of two galvanized or stainless steel wood lag bolts to firmly secure sign. 4' X 4' pressure treated wooden post with 1/2" chamfer at top. agnetic locator pin (e.g., pipe, rebar, 2 penny nail, etc.) placed 8-12" from post along CAPA line. 2 ft. min. 6" Quick-set concrete Compacted native material NOTES: 1. Critical Area signs shall be placed no greater than 1 feet apart around the perimeter of the Critical Area Preservation Area, unless otherwise approved by the County biologist. 2. Sign placement shall be subject to the approval of King County. Alternative sign designs may be submitted to King County for approval. 3. All signs must be secure and permanent.

94 Critical Areas itigation Bond Quantity Worksheet Snohomish County PUD Calligan Hydro Date: 4-ar-13 Prepared by: SB Project Number: Location: Project Description: Wetland/Buffer Restoration Applicant: Snohomish County PUD Phone: PLANT ATERIALS* Type Unit Price Unit Quantity Description Cost PLANTS: Potted, 4" diameter, medium $5. Each $ - PLANTS: Container, 1 gallon, medium soil $11.5 Each $ 43,826.5 PLANTS: Container, 2 gallon, medium soil $2. Each $ - PLANTS: Container, 5 gallon, medium soil $36. Each $ - PLANTS: Seeding, by hand $.5 SY $ - PLANTS: Slips (willow, red-osier) $2. Each $ - PLANTS: Stakes (willow) $2. Each $ - PLANTS: Stakes (willow) $2. Each $ - PLANTS: Flats/plugs $2. Each 29. $ 5,8. $ - * All costs include installation TOTAL $ 43,826.5 INSTALLATION COSTS ( LABOR, EQUIPENT, & OVERHEAD) Type Unit Price Unit Cost Compost, vegetable, delivered and spread $37.88 CY $ - Decompacting till/hardpan, medium, to 6" depth $1.57 CY $ - Decompacting till/hardpan, medium, to 12" depth $1.57 CY $ - Hydroseeding $.51 SY $ - Labor, general (landscaping) $4. HR 16. $ 6,4. Labor, general (construction) $4. HR $ - Labor: Consultant, supervising $55. HR $ - Labor: Consultant, on-site re-design $95. HR $ - Rental of decompacting machinery & operator $7. HR $ - Sand, coarse builder's, delivered and spread $42. CY $ - Staking material (set per tree) $7. Each $ - Surveying, line & grade $25. HR $ - Surveying, topographical $25. HR $ - Watering, 1" of water, 5' soaker hose $3.62 SF $ - Irrigation - temporary $3,. Acre $ - Irrigation - buried $4,5. Acre $ - Tilling topsoil, disk harrow, 2hp tractor, 4"-6" deep $1.2 SY $ - HABITAT STRUCTURES* $25. HR $ - $ - TOTAL $ 6,4. ITES Unit Cost Unit Cost Fascines (willow) $ 2. Each $ - Logs, (cedar), w/ root wads, 16"-24" diam., 3' long $1,. Each $ - Logs (cedar) w/o root wads, 16"-24" diam., 3' $4. Each $ - Logs, w/o root wads, 16"-24" diam., 3' long $245. Each $ - Logs w/ root wads, 16"-24" diam., 3' long $46. Each $ - Rocks, one-man $6. Each $ - Rocks, two-man $12. Each $ - Root wads $163. Each $ - Spawning gravel, type A $22. CY $ - Weir - log $1,5. Each $ - Weir - adjustable $2,. Each $ - Woody debris, large $163. Each $ - Snags - anchored $4. Each $ - Snags - on site $5. Each $ - Snags - imported $8. Each $ - EROSION CONTROL $ - $ - * All costs include delivery and installation TOTAL $ - ITES Unit Cost Unit Cost Backfill and Compaction-embankment $ 4.89 CY $ - Crushed surfacing, 1 1/4" minus $3. CY $ - Ditching $7.3 CY $ - Excavation, bulk $4. CY $ -