Firm Qualifications Environmental Design Build Services

Transcription

1 Firm Qualifications Environmental Design Build Services HENDERSON is a unique environmental firm that is highly experienced as a dynamic environmental design build firm specializing solely in restoration efforts throughout Oregon and Washington. Our firm offers the Cowlitz Indian Tribe comprehensive professional expertise in advancing habitat restoration efforts from concept through analysis, design development, permitting, cost estimation, value engineering, local sustainable materials sourcing, field implementation, construction management, and permit compliance/success monitoring. We believe that long term solutions to complex environmental problems can be achieved through precise assessment of existing conditions, multi disciplinary design, value engineering of alternatives, and through field implementable solutions. HENDERSON is a leader in progressive environmental assessment, design development, and sensitive lands rehabilitation/restoration services. As a highly experienced design build firm, HENDERSON brings unique field implementation expertise, cost estimation and controls, and value engineering to our habitat restoration efforts which result in optimized budgetary and process efficiencies for our clients. Our staff professionals offer exceptional analytical skills, resource design, communications and stakeholder consensus building experience. Our restoration designs and field implementation efforts have earned HENDERSON a regional reputation for the comprehensiveness of our approach, the sophistication of our analysis, and the resourcefulness of our valueengineered solutions. Integrating Local Knowledge and Working Relationships HENDERSON professionals offer exceptional field assessment and analytical capabilities, hydraulic modeling, fluvial design, project communications and stakeholder consensus building experience. We feel that we uniquely combine the depth of our experience and technical expertise with local knowledge gained through our professional work and the relationships built with area landowners, local material suppliers, and capable contractors. We believe that this unique local knowledge benefits both our cost effectiveness as well as invests back into the local community where these projects are located. Our Personnel and Professional Expertise Our environmental services personnel offer our professional commitment to fully meet our client s request for technical assistance in the development and prioritization of natural resource restoration efforts. HENDERSON offers a single point of design build responsibility for natural resources restoration projects. We have the professional environmental design and permitting expertise required, are willing to evaluate risk and assume responsibility for projects that we have designed, and are experienced in the long term post construction maintenance and permit compliance / success monitoring of projects whether or not designed by HENDERSON professionals. HENDERSON personnel, their expertise and directly related environmental project experience, and our firm s project experience summarized in the following project descriptions.

2 P a g e 2 PERSONNEL EXPERTISE Bruce Henderson MSc, CPRRD, CWS Geomorphology, Geotechnical & Soils Design Reach Assessments Soils/Streambed Materials Analysis Geotechnical Evaluations Natural Channel Design Geomorphology Sediment Transport Structural Engineering Embankment Stabilization Hydrology & Hydraulics, Fish Passage Watershed Assessments Hydrological Analysis Groundwater Monitoring Hydraulic and Hydrological Modeling Hydraulic / Fluvial Design Fish Passage Assessment & Design Structural Engineering Structural Assessments In Water Structures Engineering Dikes & Levee Construction / Removal Bridges, Roadways & Public Infrastructure Value Engineering & Cost Estimations In Design Value Engineering In Design Cost Estimations Project Constructability & Sequencing Review Sustainable Materials Re Use Assessments Tribal, Cultural, Historical & Recreational Cultural & Historical Site Assessments Tribal Coordination, Consultation & Compliance Native Wetland / Riparian Habitat Assessments Public Park & Open Space Design Natural Trail Design Technical Reports Project Proposal Evaluations and Priortization Pre Design Technical Data Evaluations Wetland Delineations Cultural and Historical Resources Assessments Hydraulic and Hydrological Analysis Biological Assessments Geotechnical Evaluations Permitting Joint Wetland Fill/Removal EPA/DEQ NPDES Federal NEPA Federal Section 408 Permitting Federal Section 7 ESA Consultation Erosion Control / Grading Permits Restoration Field Construction Project Management Field Restoration Construction Cost Estimations / Tracking Field Restoration Value Engineering As Built Project Documentation Mapping/Survey Field Resource Survey Office Survey Production GPS Field Mapping GPS Office Production Watershed / Terrain Modeling Project Manager, Contract Administration Matt Koozer CPRRD, CPESC Environmental Design Lead Nick Southall MSc, CPESC Ecologist, Sustainable Materials Re Use PERSONNEL EXPERTISE

3 Page 3 Bruce A. Henderson MSc, CPRRD, CSDP Project Manager, Contracting Officer Mr. Henderson has actively managed watershed level and stream specific environmental design and implementation efforts throughout the Pacific Northwest for over two decades. Bruce s professional training includes certification as a Certified Professional in Stream Restoration Design and a Certified Stream Restoration Professional. He has completed professional development courses on fluvial geomorphology and natural channel design including Applied Fluvial Geomorphology, River Morphology and Applications, River Assessment and Monitoring, and River Restoration and Natural Channel Design. At Portland State University, Bruce taught the intensive 3 day graduate and professional certification course in Restoration Project Management. His professional work has been awarded Oregon s Grand Award for Water Quality Environmental Design from the Oregon Council of Consulting Engineers. He is a frequent speaker throughout the Pacific Northwest on the practice of restoration design and construction management in sensitive environments. Bruce is a firm believer in bringing the art to the science of resource restoration. Mathew T. Koozer, CPSRD, CPESC Senior Designer, Lead Environmental Restoration Project Manager Matt Koozer has over 14 years of experience in the habitat restoration field. He lives a double life as HENDERSON S Senior Design and Construction Project Manager for river, stream, estuary and wetland habitat restoration efforts. Matt s enthusiasm and expertise is best applied is when he s in the field managing HENDERSON S environmental restoration and enhancement projects. Matt excels for our clients through his field practical experience with sequencing multiple elements of successful environmental restoration; from value engineering projects and providing our clients with realistic costs estimations through efficient construction sequencing, exploration of alternative habitat restoration means and methods, and providing an experienced eye for sustainable material re use and green source materials acquisition. When he s not getting muddy, Matt can be found in the office working on design development, digital terrain modeling, construction plans and specifications, design drawings, and construction cost estimating. For his environmental restoration work, Matt has been awarded the Governor s Stream Restoration Award and two Regional Erosion Prevention Awards for Capital Projects For demonstrating exceptional performance in the field of erosion prevention and sediment control.

4 Page 4 Nick Southall MSc, CPESC Environmental Project Manager Nick Southall is an experienced project manager with 12 years of environmental consulting experience on a wide variety of natural water resources projects. His professional experience includes wetland habitat design, backwater, high flow, and groundwater channel creation, fish passage enhancements, and dam removals. He has worked closely with municipalities, private landowners, tribal groups, and non profit organizations. Nick has a diverse skill set and is experienced both in the technical aspects of project design and as a project manager. He has completed multiple site assessments, topographic surveys, developed and drafted construction design documents, erosion control plans, provided construction oversight, and conducted post project monitoring. Nick has a strong understanding of working with a variety of disciplines and he integrates his fluvial geomorphic and natural resource knowledge into design development. Successful design, implementation and establishment of restoration and enhancement projects are ultimately what Nick enjoys. Outside of work he enjoys time with his family and takes pleasure from the many outdoor pursuits the Pacific Northwest has to offer. Mary K. Pope Client Services Manager Mary Pope has worked in providing top shelf customer service to clients for over 20 years. Mary is our firm s central point of contact for client inquiries, public relations, quality of service, scheduling, and on time production of project deliverables. To our staff and our clients, her ready humor is as appreciated as her constructive advice and positive attitude. At HENDERSON, none of our professionals are solely office creatures Mary can often be found actively engaged assisting our project staff in the field. Mary also enjoys her life outside of her professional career, kayaking, zip lining, snow shoeing or otherwise taking part of her world. If you re looking for the beating heart of HENDERSON, call Mary.

5 P a g e 5 EXPERTISE WITH RIVERINE, ESTUARINE, AND TIDAL SLOUGH HABITAT RESTORATION PROJECTS Otter Point Restoration Design, Permitting, and Construction SF Klaskanine River Dam Removal and Hatchery Diversion Repair Elk Flats Tidal Reconnection and Estuarine Habitat Restoration Necanicum River/Circle Creek Hydrologic Study Gnat Creek Tidal Reconnection and Estuarine Habitat Restoration Columbia County SWCD Emergency Embankment Stabilization Merril Creek Embankment Stabilization Big Creek Bank Stabilization and Riparian Habitat Enhancement Ecola Creek Estuary and Salmon Habitat Restoration Stephens Creek Restoration Alternatives Analysis South Deer Island Slough Hydraulic Analysis and Engineering Geomorphology, Geotechnical & Soils Design Reach Assessments Soils/Streambed Materials Analysis Geotechnical Evaluations Natural Channel Design Geomorphology Sediment Transport Structural Engineering Embankment Stabilization Hydrology & Hydraulics, Fish Passage Watershed Assessments Hydrological Analysis Groundwater Monitoring Hydraulic and Hydrological Modeling Hydraulic / Fluvial Design Fish Passage Assessment & Design Structural Engineering Structural Assessments In Water Structures Engineering Dam, Dike & Levee Construction / Removal Bridges, Roadways & Public Infrastructure Value Engineering & Cost Estimations In Design Value Engineering In Design Cost Estimations Project Constructability & Sequencing Review Sustainable Materials Re Use Assessments Tribal, Cultural, Historical & Recreational Cultural & Historical Site Assessments Tribal Coordination, Consultation & Compliance Native Wetland / Riparian Habitat Assessments Public Park & Open Space Design Natural Trail Design Technical Reports Project Proposal Evaluations and Priortization Pre Design Technical Data Evaluations Wetland Delineations Cultural and Historical Resources Assessments Hydraulic and Hydrological Analysis Biological Assessments Geotechnical Evaluations Permitting Joint Wetland Fill/Removal EPA/DEQ NPDES Federal NEPA Federal Section 408 Permitting Federal Section 7 ESA Consultation Erosion Control / Grading Permits Restoration Field Construction Project Management Field Restoration Construction Cost Estimations / Tracking Field Restoration Value Engineering As Built Project Documentation Mapping/Survey Field Resource Survey Office Survey Production GPS Field Mapping GPS Office Production Watershed / Terrain Modeling Tryon Creek Confluence Habitat Enhancement Design Lents Crossing/Johnson Creek Engineered Logjam Design EXPERTISE WITH RIVERINE, ESTUARINE, AND TIDAL SLOUGH HABITAT RESTORATION PROJECTS

6 Page 6 Selected Habitat Restoration Projects Whychus Creek Irrigation Dam Removal and Channel Restoration Whychus Creek s drainage covers a total of 230 square miles beginning in the Three Sisters Wilderness, and extending north eastward through the Deschutes National Forest, the City of Sisters, private agricultural land, and sagebrush steppe upland before discharging to the Deschutes River. Historically, Whychus Creek has occupied many different locations across its deposited alluvial fan. As the City has grown and expanded along and around Whychus Creek through the years, the creek s dynamic responses to changes in land use, flooding, channel instability, and bank erosion threatens property, public safety and the health of the creek. Whychus Creek is located in a relatively fixed position as it flows through the City. Left to natural processes, Whychus Creek would continue to migrate laterally across its outwash plain. In addition, the creek being mainly snow melt driven displays great variations in flows both on a daily and seasonal basis. Flooding events are not uncommon, especially in the fall and early winter when rain on snow events occur. In many instances homes have been constructed within the Federal Emergency Management Agency (FEMA) 100 year floodplain or within the channel migration zone (CMZ). Under a design build contract with the Upper Deschutes Watershed Council, HENDERSON is evaluating dam removal and stream channel restoration alternatives. Our team s technical analysis and design development of the Whychus Creek Irrigation diversion dam Removal effort will build upon the community consensus that UDWC has generated with the City and project shareholders. HENDERSON professionals are developing designs to deter embankment erosion within the existing channel constrained by the irrigation diversion dam, and to restore potential floodplain capacity, embankment stability, sediment transport, and fishery habitat within this reach of Whychus Creek after dam removal. Final restoration design will address the issues still facing the community, focusing strongly on protection of property and the bioengineered stabilization of adjacent floodplain and channel embankments, while balancing resource objectives for in water fisheries habitat and native riparian plant communities. Our final design will integrate the habitat needs of all life stages for summer steelhead, redband trout, and spring Chinook salmon as well as primary fishery limiting factors including; limited structural diversity, lack of large woody material, pools, undercut banks, and gravel streambed features.

7 Page 7 Otter Point Tidal Habitat Restoration Final Design, Section 408 Permitting, River Levee Setback and Restoration Construction HENDERSON environmental design professionals teamed the Columbia River Estuary Study Taskforce and the National Park Service to develop a comprehensive restoration plan that interprets the natural estuarine landscape of the Otter Point Estuarine Habitat Restoration Project site along the Lewis and Clark River, a tidallyinfluenced tributary to the lower Columbia River. HENDERSON S design team cooperatively developed alternative conceptual restoration designs after preliminary assessment and evaluation of existing site resources and condition, and upon conducting cultural/historical analysis. HENDERSON S restoration design alternatives examined levee breaching, tidal slough excavation, invasive species management, off channel fish refugia, estuarine plant community diversity and structural restoration, and potential development of an interpretive trail/educational signage component with local schools. To mitigate the risk of flooding other properties, the levee present along the north site boundary will be enhanced to meet USACE requirements. HENDERSON S design team prepared key geotechnical guidance resulting in the first Section 408 Permit (levees and dams) issued by the Portland branch of the US Army Corps of Engineers that met or exceeded criteria established by the Corps post Hurricane Katrina (2006). HENDERSON S team evaluated the feasibility and cost efficiencies of using on site material and soil from the existing levee for the levee enhancement; and developed geotechnical recommendations for design and construction of the dike. HENDERSON is currently implementing their estuarine restoration design including excavation of multiple backwater channels, sustainable re use of excavated materials for use in the levee construction, installation of extensive shallow water brush wrack and LWD habitat structures, and the construction of the northern setback levee that meets current Corps of Engineers post Katrina standards. Our Otter Point Estuarine Habitat Restoration Project will reconnect more than 17 acres of historic lower Columbia River Basin tidal wetlands to riverine and tidal inundation, restoring high value salmonid off channel habitat.

8 Page 8 Multnomah and Wahkeena Creeks Restoration Design Alternatives Multnomah Creek downstream of Multnomah Falls is a short reach of stream that flows into Benson Lake. The lake flows into Wahkeena Creek to the west where the combined flows eventually discharge into the Columbia River. Historically Multnomah Creek flowed directly into the Columbia River north of Multnomah Falls creating an alluvial fan. Multnomah Creek periodically filled its channel with alluvium and then avulsed to another part of the fan, constantly renewing and building the fan surface. Similar landscape features can be seen throughout the Columbia Gorge where small, relatively steep streams join the Columbia River. Multnomah Falls Visitor Center is Oregon s most highly visited tourist attraction. With development of the lodge and visitor facilities, and with development of the adjacent US Interstate 84, Multnomah Creek has been severely impacted by transportation and Visitor Center management activities. Today, Multnomah Creek s channel is constricted by a historic bridge, a railroad bridge, and two historic rock walls. It s riparian area and fan floodplain has been entirely removed below the falls with a visitor walkway constructed in its place. Multnomah Creek s channel has been redirected and the discharge point altered, changing the channel slope and thus sediment transport capacity and capability of the creek. Because the creek is in an alluvial fan position and sediment transport has been altered, the lower channel regularly fills with gravel during wet years and large flow events (on the average, about every four years). Today, Multnomah Creek s channel must be dredged and maintained to restore limited capacity and decrease flooding. Maintenance dredging has had direct and indirect negative impacts on aquatic habitat. HENDERSON environmental design build professionals are working with the Lower Columbia Estuary Partnership in developing and prioritizing alternative designs to restore potential floodplain capacity, complexity, sediment transport, and fishery habitat to the Multnomah Creek Wahkeena Creek Benson Lake system. Our designs are evolving with input from within a coalition of active project stakeholders including the US Forest Service, Oregon State Parks, Columbia Gorge National Scenic Area, Oregon Department of Fish and Wildlife, and the East Multnomah Drainage District. Design objectives for habitat enhancement include improving spawning, rearing, and winter refugia conditions for ESA listed Columbia River salmonids. HENDERSON professionals will develop construction ready plans for the highestpriority designs for implementing improvements to fish passage, hydrologic and geomorphic processes, thermal regimes in both the creek and lake habitats, riparian and floodplain connectivity, and to decrease storm water runoff impacts from the adjacent public infrastructure.

9 Page 9 South Fork Klaskanine River Dam Removal, Hatchery Diversion, and Salmon Habitat Restoration HENDERSON environmental design build professionals removed an existing concrete dam on the South Fork of the Klaskanine River to restore about 500 feet of active river channel and improve conditions for wild salmonid migration routes. Additionally, HENDERSON S design was required to provide reliable passive seasonal diversion to Clatsop County s adjacent salmon hatchery. HENDERSON s work was integral to a larger effort at Clatsop County s salmon hatchery within the Young s Bay watershed located near Astoria. The goal of this project in its entirety was to eliminate a concrete dam that prevented fish passage during low river flows and to improve the then threatened runs of wild salmon and steelhead and at the same time, continue to provide a diversion for existing hatchery operations. HENDERSON S work included rescue and removal of more than 200 juvenile Coho and Chinook salmon, cutthroat trout, Pacific lamprey and Pacific salamanders within the project reach; isolation and dewatering of the South Fork Klaskanine River to eliminate construction related turbidity during inwater work; installation of large wood and root wads, biodegradable erosion control fabric wrapped native soil lifts, and more than 1,200CY of 3 foot and 4 foot boulders and river cobble. HENDERSON s South Fork Klaskanine Project was funded by a multi faceted group of local, state, and federal stakeholders.

10 Page 10 Elk Flats Estuarine Salmon Habitat Restoration Restoration objectives of the Columbia River Estuary Study Taskforce s Elk Flats Estuarine Salmon Habitat Restoration Project were to create a forested wetland side channel in the lower reach of Ecola Creek, recreating critical rearing habitat for native juvenile salmonids. HENDERSON is working with CREST, the Ecola Creek Watershed Council, and the City of Cannon Beach on implementation of the City s Coastal Coho ESA Response Plan. Elk Flats is located within a series of historic estuarine channels and backwater habitat in the lower Ecola Creek watershed. Ecola Creek drains approximately twenty two square miles and confluences directly with the Pacific Ocean. The lower reaches of Ecola Creek provide excellent spawning habitat used annually by coho, Chinook, steelhead, and coastal cutthroat. Restoration in the Elk Flats tidewater region helps to offset the loss of side channel juvenile rearing habitat, the primary limiting factor for the success of native salmonids in the fresh to saltwater transition zone of Ecola Creek. HENDERSON S implementation of the Elk Flats Project effort restored approximately 2.5 acres of degraded tidallyinfluenced, forested wetlands to functional coastal salmonid habitat. Project enhancements included; excavation of over 400 feet of side channel habitat to deepen wetland areas and recreate a tidal channel network, installation of large woody debris, and creation of a berm and bioswale adjacent to the highway to filter stormwater runoff. HENDERSON S design build professionals creatively and cost effectively field fit aspects of the design not apparent during the planning phase. The Ecola Creek Watershed Council is very pleased with the work that HENDERSON performed for us during construction of the Elk Flats Project. This particular project presented substantial construction challenges, such as working with large equipment in small spaces and wet conditions. In spite of these challenges, HENDERSON S team of environmental professionals were able to complete construction work on schedule, while upholding and creatively achieving the design intent. CREST Project Manager HENDERSON S field restoration team successfully incorporated extensive buried wood and root masses, where trees had been inundated and killed in a long ago tsunami. Native slough sedge clumps were salvaged in large quantities during excavation and installed into the newly constructed banks. Within an hour of connecting the newly created backwater channel to Ecola Creek a river otter was seen swimming near the mouth obviously curious about the newly created habitat.

11 Page 11 Kelley Creek Flood Mitigation and Fish Passage Restoration Situated at the confluence of Johnson Creek and Kelley Creek, the Kelley Creek Flood Mitigation and Fish Passage Restoration Project was identified as a top priority area in Portland s watershed for restoration by the City of Portland s Bureau of Environmental Services. The first of several BES projects targeted by the Johnson Creek Restoration Plan, the City and the Johnson Creek Watershed Council developed a comprehensive approach to the restoration of Johnson Creek and its tributaries. Cool water temperatures and the documented presence of Coho salmon and steelhead in lower Kelley Creek led the City of Portland to initiate Johnson Creek watershed restoration activities. In the 1930 s, the depression era Works Progress Administration (WPA) straightened and lined Kelley Creek and Johnson Creek with rock. Channel straightening and lining led to the reduction or complete removal of fish habitat quality and a decrease in floodplain connectivity and channel hydraulic capacity. HENDERSON S restoration construction effort removed over 28,000 cubic yards of soil, creating several large backwater refugia for juvenile salmonids and 500 lineal feet of newly created Kelley Creek stream channel. Our field crews isolated and dewatered portions of Johnson Creek and Kelley Creek to eliminate construction related turbidity during in water work. Over100 logs and root wads were installed to provide fish cover, bank stability, and floodplain roughness, many integrated into vegetated encapsulated soil lifts along the newly created stream banks. Streambed materials incorporated custom blended river stone and spawning gravel. In concert with HENDERSON S corporate ethic for sustainability, HENDERSON crews also made every effort to salvage and reutilize on site logs, woody debris, and topsoil for use in the fish habitat structures and our floodplain revegetation efforts. HENDERSON S Kelley Creek restoration work provides significantly enhanced spawning opportunities for Coho salmon, steelhead, and cutthroat trout. Additionally, more than five acres of land are now actively engaged by flood flows for floodwater retention, relieving developed areas downstream of Kelley Creek from flooding.

12 Page 12 Tryon Creek Fish Passage Restoration Alternatives Study HENDERSON environmental planners, stream restoration ecologists, watershed analysts, and graphic designers were selected by the City of Lake Oswego, Oregon to build consensus within a multiagency Partnership of local, state and federal resource and transportation interests for the removal of an existing culvert on Tryon Creek beneath Hwy 43. HENDERSON provided the primary leadership and technical expertise in building consensus within the Partnership for consideration of design alternatives developed through this Study. Future implementation of the Partnership s preferred Study alternative would result in the restoration of Tryon Creek from the Willamette River through the 645 acre Tryon Creek State Natural Area Park. The Oregon Department of Fish and Wildlife has prioritized removal of the existing fish passage barrier as one of the greatest opportunities in Oregon to re extend significant fish habitat into a local watershed. Restoration would reconnect approximately eight miles of Tryon Creek to year round passage of fish and other aquatic species, improving in stream and riparian habitat for fish and wildlife. US Fish and Wildlife Service s Habitat Improvement Program funded this Study. Study design elements prioritized by the Partnership included improvement of passage of targeted fish species, primarily salmonid and lamprey, between the lower and upper reaches of Tryon Creek and provide year round fish passage to other native species during all life stages. Enhancements of riparian habitat and watershed connectivity for indigenous wildlife and providing public recreational access with passage beneath Hwy 43 were also key objectives for design alternatives considered. With our design build expertise, HENDERSON S unique ability to provide cost estimation and value engineering of alternative concepts being considered greatly helped to focus the Partnership s final selection of a preferred design concept. Old timers tell about a time decades ago when the creek ran thick with coho salmon, steelhead and cutthroat trout. Today, fish experts believe salmon have trouble jumping into the Tryon Creek culvert from the plunge pool on the downstream side. "The culvert is a major barrier to fish migrating upstream," says Ronald Kroop, regional manager for the Oregon Department of Transportation. ODOT and other local, state, and federal resource agencies have joined in a partnership to improve the culvert and improve native fish passage The Oregonian

13 Page 13 South Fork Klaskanine River Dam Removal, Hatchery Diversion, and Salmon Habitat Restoration HENDERSON environmental design build professionals removed an existing concrete dam on the South Fork of the Klaskanine River to restore about 500 feet of active river channel and improve conditions for wild salmonid migration routes. Additionally, HENDERSON S design was required to provide reliable passive seasonal diversion to Clatsop County s adjacent salmon hatchery. HENDERSON s work was integral to a larger effort at Clatsop County s salmon hatchery within the Young s Bay watershed located near Astoria. The goal of this project in its entirety was to eliminate a concrete dam that prevented fish passage during low river flows and to improve the then threatened runs of wild salmon and steelhead and at the same time, continue to provide a diversion for existing hatchery operations. HENDERSON S work included rescue and removal of more than 200 juvenile Coho and Chinook salmon, cutthroat trout, Pacific lamprey and Pacific salamanders within the project reach; isolation and dewatering of the South Fork Klaskanine River to eliminate construction related turbidity during in water work; installation of large wood and root wads, biodegradable erosion control fabricwrapped native soil lifts, and more than 1,200CY of 3 foot and 4 foot boulders and river cobble. HENDERSON s South Fork Klaskanine Project was funded by a multi faceted group of local, state, and federal stakeholders. Calapooia River Final Design and Construction The Calapooia Watershed Council selected HENDERSON environmental design build professionals to finalize 30% design drawings and specifications and construct five projects within the designated Reach 3 of the Calapooia River. Reach 3 is an important segment of the Calapooia River, an important tributary of the Willamette River, located immediately downstream of Brownsville, Oregon. HENDERSON S embankment stabilization and off channel habitat restoration work included enhancement of several backwater channels and ponds by reconnecting historic backwater habitats with the river, providing log and slash habitat cover and complexity, and removing invasive plant species. Other design build elements included removing a constructed floodplain berm to reconnect the floodplain to seasonal river discharge events, and field fitting the design and construction of a complex LWD structure spanning over 300 lineal feet of river bank. HENDERSON S Reach 3 design build efforts for the Calapooia River will provide important backwater channel habitat complexity, increased floodplain connectivity frequency, riverbank stabilization and near bank habitat enhancement, and positive continued Council/landowner relations.

14 Page 14 Tryon Creek Confluence Fish Passage Enhancement Design HENDERSON environmental design professionals teamed together to design and assist in the permitting of a floodplain/riparian habitat enhancement effort for a 900 foot reach of Tryon Creek at the confluence with the Willamette River. Tryon Creek is physically constrained geologically and by land use development, but has great restoration potential for enhancing salmon, steelhead, and lamprey habitat within the local watershed. This project involves grading a narrow floodplain bench, constructing a backwater/floodplain cove for refuge, installing large wood structures along the channel and on the bank of the Willamette River next to the mouth of Tryon Creek. This enhancement project by the City of Portland is a follow up to a fish passage enhancement project constructed in 2008 at a culvert at the upstream end of the project reach. Columbia County SWCD Emergency Embankment Stabilization After significant coastal and riverine flooding, HENDERSON professionals assisted the Columbia County Soil and Water Conservation District and the Nehalem River Conservation Council to stabilize and restore structural integrity and riparian habitat along several seriously eroded Nehalem River and tributary streams channels. Henderson provided emergency embankment stabilization construction services under permitting guidance and project field review by the Natural Resources Conservation Service State Hydrologic Engineer. Embankment stabilization and habitat recovery field construction methods applied to these destabilized reaches included placement of large wood debris, engineered logjams, embankment regrading, soil/native aggregate filled compacted lifts, and installation of dense native riparian vegetation between and above these lifts to optimize embankment structure and to reduce near embankment flow velocities. Big Creek Bank Stabilization and Riparian Habitat Enhancement HENDERSON worked with fishing lodge owner Howard Kem to place engineered log jams (ELJ) and to enhance riparian and fishery habitat along the embankments of Big Creek to restore native Coho, Chinook, and steelhead habitat. HENDERSON placed nine ELJ s and over 400 lineal feet of vegetated soil encapsulated lifts to correct bank erosion due to increased flow velocities through reestablishing a stable channel configuration and repose of a well vegetated (native riparian vegetation) embankment. Gnat Creek Tidal Habitat Habitat Restoration HENDERSON environmental design professionals are assisting the Columbia River Estuary Study Taskforce (CREST) with assessment, hydraulic analysis, evaluation and design of a potential floodplain restoration site in a tidallyinfluenced reach of Gnat Creek, which discharges to the Columbia River estuary. CREST s Gnat Creek project site is approximately 20 acres of leveed floodplain wetland with an adjacent earthen dam impounding water from a small tributary. Options for site restoration included levee removal, enhancement of floodplain channels and wetland vegetation, and dam removal and tributary restoration. HENDERSON evaluated the site s topographic survey and effectiveness of the existing partially breached levee in protecting a cross floodplain roadway from flooding during high water conditions. HENDERSON is developing design restoration documents for assisting CREST in securing further project funding.