Notice of Availability of an Environmental Assessment Worksheet (EAW) Polk County Proposed MSW Landfill Expansion and Proposed Gravel Mine

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1 Public Comment Information EW Public comment period begins: March 7, 2016 EW Public comment period ends: pril 6, 2016 Notice published in the EQB Monitor: March 7, 2016 Notice of vailability of an Environmental ssessment Worksheet (EW) Polk County Proposed MSW Landfill Expansion and Proposed Gravel Mine Doc Type: Public Notice Facility Specific Information Facility name and location: Polk County Proposed MSW Landfill Expansion nd Proposed Gravel Mine Gentilly Township, Polk County Facility contact: Jon Steiner Environmental Service Director 320 Ingersoll ve; P.O. Box 375 Crookston, MN Phone: Fax: MPC Contact Information MPC EW contact person: Kevin Kain Project Manager ddress: 520 Lafayette Road North City, State, ZIP: St. Paul, MN Phone: Fax: MPC Permit contact person: Lisa Mojsiej Permit Engineer 520 Lafayette Road North City, State, ZIP: St. Paul, MN Phone: Fax: General Information The Minnesota Pollution Control gency (MPC) is distributing this Environmental ssessment Worksheet (EW) for a 30-day review and comment period pursuant to the Environmental Quality Board (EQB) rules. The MPC uses the EW and any comments received to evaluate the potential for significant environmental effects from the project and decide on the need for an Environmental Impact Statement (EIS). n electronic version of the EW is available on the MPC Environmental Review webpage at If you would like a copy of the EW or NPDES/SDS Permit or have any questions on the EW or NPDES/SDS Permit, contact the appropriate person(s) listed above. Description of Proposed Project Polk County (Proposer) operates an existing regional solid waste management facility at its Gentilly Solid Waste Landfill (Facility), eight miles east of Crookston. The Proposer s Facility is located on a contiguous 360 acre Polk County owned property (County Property). The Proposer plans to increase the municipal solid waste (MSW) landfill disposal capacity at the Facility by developing 13 acres within the 360 acre County Property (MSW Landfill Expansion). The Proposer also plans to operate a 21 acre sand and gravel mining operation (Gravel Mine) on other portions of the same 360-acre County Property. p-ear2-96a TTY or vailable in alternative formats i-admin /2/14 Page 1 of 2

2 Written comments on the EW must be received by the MPC EW contact person within the comment period listed above. For information on how to comment on the (NPDES/SDS Permit, contact the MPC Permit contact person listed above. NOTE: ll comment letters are public documents and will be part of the official public record for this project. Need for an EIS The MPC Commissioner will make a final decision on the need for an EIS after the end of the comment period TTY or vailable in alternative formats i-admin /2/14 Page 2 of 2

3 ENVIRONMENTL SSESSMENT WORKSHEET This Environmental ssessment Worksheet (EW) form and EW Guidelines are available at the Environmental Quality Board s website at: The EW form provides information about a project that may have the potential for significant environmental effects. The EW Guidelines provide additional detail and resources for completing the EW form. Cumulative potential effects can either be addressed under each applicable EW Item, or can be addresses collectively under EW Item 19. Note to reviewers: Comments must be submitted to the RGU during the 30-day comment period following notice of the EW in the EQB Monitor. Comments should address the accuracy and completeness of information, potential impacts that warrant further investigation and the need for an EIS. 1. Project Title: Polk County Proposed MSW Landfill Expansion and Proposed Gravel Mine 2. Proposer: Polk County 3. RGU: Minnesota Pollution Control gency Contact person: Jon Steiner Contact person: Kevin Kain Title: Environmental Service Director Title: Project Manager ddress: 320 Ingersoll ve; P.O. Box 375 ddress: 520 Lafayette Road North City, State, ZIP: Crookston, MN City, State, ZIP: St. Paul, MN Phone: Phone: Fax: Fax: enrionmental.svs@co.polk.mn.us kevin.kain@state.mn.us 4. Reason for EW Preparation: (check one) Required: oeis Scoping X Mandatory EW Discretionary: o Citizen Petition o RGU Discretion o Proposer Initiated If EW or EIS is mandatory give EQB rule category subpart number(s) and name(s): Solid Waste: 4410:4300, subpart 17, B. Expansion by 25 percent or more of previous capacity of a mixed municipal solid waste disposal facility for up to 100,000 cubic yards of waste fill per year. Nonmetallic Mineral Mining: , subpart 12, B., C. B. Development of a facility for the extraction of sand gravel stone or other nonmetallic minerals, other than peat, which will excavate 40 or more acres of land to a mean depth of ten feet or more during its existence. and C. Development of a facility for the extraction of sand, gravel, stone, or other nonmetallic minerals, other than peat, which will excavate 20 or more acres of forested or other naturally vegetated land in a non-sensitive shoreland area. p-ear1-04 TDD (for hearing and speech impaired only): Printed on recycled paper containing 30% fibers from paper recycled by consumers

4 5. Project Location: County: Polk City/Township: Gentilly Township PLS Location (¼, ¼, Section, Township, Range): Section 26: Township 150N: Range 45W Watershed (81 major watershed scale): GPS Coordinates: UTM E: N: Lat: 47 46' " N Long: 96 22' " W Tax Parcel Numbers: , , List of Figures: Figure 1 Regional Site Location Figure 2 Site Location (USGS Topographic Map) Figure 3 Existing and Proposed Landfill Operations Figure 3- Landfill Liner and Leachate Collection Schematic Figure 4 Proposed Gravel Mine - Conceptual Phasing Figure 5 County Property and djacent Properties Figure 6 Glacial Ridge National Wildlife Refuge and MDNR Lands Figure 7 Prime Farmland Figure 8 Soil Series Survey Figure 9 Watersheds Figure 10 Surface Waters near County Property Figure 11 Private Water Supply Wells One Mile Radius Figure 12 High Capacity Wells Three Mile Radius Figure 13 Wellhead Protection reas (Crookston Water Supply Well Field) Figure 14 Landfill Environmental Monitoring System & Compliance Boundary Figure 15 Wetlands within Proposed MSW Landfill Expansion Figure 16 Municipal Solid Waste ( MSW ) Landfill Cross Section Figure 17 MSW Leachate Collection System Details List of Tables: Table 1 Proposed MSW Landfill Expansion Phases Table 2 Proposed Environmental Monitoring System (EMS) Schedule and Parameter List ppendices: ppendix Department of Natural Resources Natural Heritage Review ppendix B State Historic Preservation Office Information ppendix C City of Crookston agreement to take and treat leachate 6. Project Description: a. Provide the brief project summary to be published in the EQB Monitor, (approximately 50 words). Polk County (Proposer) operates an existing regional solid waste management facility at its Gentilly Solid Waste Landfill (Facility), eight miles east of Crookston. The Proposer s Facility is located on a contiguous 360 acre Polk County owned property (County Property). The Proposer plans to increase the municipal solid waste (MSW) landfill disposal capacity at the Facility by developing 13 acres within the 360 acre County Property (MSW Landfill Expansion). The p-ear1-04 TDD (for hearing and speech impaired only): Printed on recycled paper containing 30% fibers from paper recycled by consumers

5 Proposer also plans to operate a 115 acre sand and gravel mining operation (Gravel Mine) on other portions of the same 360-acre County Property. b. Give a complete description of the proposed project and related new construction, including infrastructure needs. If the project is an expansion include a description of the existing facility. Emphasize: 1) construction, operation methods and features that will cause physical manipulation of the environment or will produce wastes, 2) modifications to existing equipment or industrial processes, 3) significant demolition, removal or remodeling of existing structures, and 4) timing and duration of construction activities. Existing Facility Operations (see Figure 3) Background The Proposer owns and operates its Facility on a 360-acre site near Gentilly, Minnesota. The Facility is located approximately eight miles east of Crookston, Minnesota, approximately one mile north of U.S. Highway 2 on 160 th venue SW in Section 26 Township 150N, Range 45W. The Facility has the following distinct components: Disposal rea Description bbreviation Municipal Solid Waste Landfill MSW Landfill S002 MSW Combustor sh Disposal rea sh Landfill M001 Solid Waste Permit SW- 124 Identifier Demolition Debris Disposal rea Demolition Landfill DD002 Source Separated Organic Material (SSOM) and Yard Waste Composing rea Composting rea MC001, S001, DD001 In addition to the Facility, the Polk County solid waste management system also includes the following primary components at other off-site locations: Solid Waste Transfer Station located in Crookston, Minnesota Materials Recovery Facility located in Fosston, Minnesota Waste-to-Energy Facility (WTE) located in Fosston, Minnesota Regional Recycling Centers located in Crookston, Fosston, East Grand Forks, Fisher, Euclid, Fertile, Mentor, Erskine, McIntosh, Winger, Lengby, and Trail/Gully. Household hazardous waste collection sites located in Crookston and Fosston Minnesota. Polk County manages its own waste and presently manages solid waste through an integrated solid waste management system from Beltrami, Clearwater, Mahnomen, and Norman Counties. In addition, Polk County is anticipating receiving solid waste materials from Hubbard and Red Lake Counties starting in Environmental ssessment Gentilly Township, Polk County, Minnesota 3 Worksheet

6 Operating History MSW Landfill The landfill portion of the Facility has been in operation since 1975 under Minnesota Pollution Control gency (MPC) Solid Waste Permit SW-124. From 1974 to 1992, the Proposer managed MSW at the Facility in the un-lined area that was within the guidelines of the original permit, with some updated procedures added in 1989 for groundwater monitoring, and for disposal of incinerator ash in a lined facility. The Proposer closed, and MPC approved, the original MSW disposal area (S001). Since then the Proposer has been operating the Facility in its current location, which consists of12 lined MSW disposal cells (Phases) approximately one-acre each. The Proposer constructed Phases1 through 10 from 1992 through 2015, and placed final cover on portions of Phases 1 through 5.Phase 10 is currently in use and Phases 11 and 12 have not yet been constructed. sh Landfill The ash landfill was initially permitted and constructed in 1989 and has continued to operate and with the construction of additional permitted phases. Of its six phases, Phase 1 is closed as is a portion of Phase 2. Phases that are active are Phase 3, 5, and a portion of Phase 2. Future phases include Phase 4 and 6. Demolition Landfill The Proposer, in accordance with an ugust 1996 pplication for Minor Permit Modification, developed a new demolition debris disposal area that was established over the original closed MSW disposal area at the site. The Proposer s previous demolition debris disposal area (DD001) near the landfill office was closed and the final cover was put in place in The current demolition landfill site consists of four phases with all phases (1D through 4D) being utilized. The Proposer previously closed portions of Phases 1D and 2D of the current demolition landfill. Composting rea In February of 2011 the MPC issued a permit that allowed the Proposer to operate a composting area over a portion of the former closed MSW disposal area. The Proposer s composting facility is permitted and once construction is completed the composting area will be nine acres in size and permitted to accept source separated organic material (SSOM) and yard waste for composting material. The composting area is located over a portion of the old MSW closed landfill and has a capacity to manage up to 3,000 cubic yards each of yard waste or other acceptable bulking/carbon items (i.e. shredded wood, sawdust, agricultural residue, or byproducts) and SSOM. The compost area has approximately 16,000 cubic yards of active windrow capacity and 6,000 cubic yards for storing finished compost. Current Operations Existing MSW Landfill The Facility has a current total permitted MSW capacity of 1,655,700 cubic yards. Environmental ssessment Gentilly Township, Polk County, Minnesota 4 Worksheet

7 The current active lined MSW fill areas at the Facility are designated as Phases The current MPC permitted disposal area at the Facility includes development of Phases 11 and future development of Phase 12. Existing sh Landfill The Proposer has no proposed changes to the ash landfill. The current total permitted capacity for the ash landfill is 179,500 cubic yards with a current ultimate site capacity of 337,000 cubic yards. The currently permitted ash disposal area consists of ash disposal cells 1 through 6. Existing Demolition Landfills The current total MPC permitted capacity for the demolition landfill (Disposal areas DD001 (Closed Site) and DD002) is 263,100 cubic yards with a current ultimate site capacity of 299,900 cubic yards. The current active demolition fill area is designated as demolition disposal areas 1D- 4D. The current permit also includes the future development of demolition disposal area 5D. MSW Landfill Expansion The Proposer plans to expand the MSW landfill disposal area in phases over the next 60 years from the current 622,400 cubic yards of air space to 4,643,600 cubic yards of air space (ttachment 1). The Proposer will expand the MSW landfill horizontally to the east of the current MSW disposal area of approximately 42 acres and vertically expanding over the current MSW disposal area by increasing the final permitted elevation from 1,088 to 1,122 feet. The Proposer anticipates two future MSW landfill expansions at the Facility, expansion two in approximately 2030 and expansion three in approximately This EW includes MPC review of the Proposers MSW Landfill Expansion plans and related design plans and construction specifications. The MPC will be reviewing the expansion of Phases 13 through 16 in this EW. Phases 13 through 16 will add approximately acres or 1, cubic yards air space for the disposal of mixed municipal waste. In the future expansion two (Phases 17 through 20) will add approximately acres or 1,191,800 cubic yards of air space for the disposal of mixed municipal waste. Expansion three (Phases 21 through 24) will add approximately acres or 1,595,600 cubic yards of air space for disposal of mixed municipal waste. Both expansion two and expansion three will require the preparation of an environmental assessment worksheet under Minn. R subp 17.B. For expansion by 25 percent or more of previous capacity of a mixed municipal solid waste facility for up to 100,000 cubic yards of waste fill per year. Locational Standards The MSW Landfill Expansion and Demolition Landfill Expansion will meet all of the MPC permit standards for location and setback distances; (in accordance with Minn R and , subp. 2. Edge of waste is greater than 200 feet from the property boundary The nearest public water is greater than 300 feet from property boundary The MSW Landfill Expansion is not within a 100-year floodplain Edge of waste is more than the minimum 1,000 feet setback from the nearest highway Environmental ssessment Gentilly Township, Polk County, Minnesota 5 Worksheet

8 The MSW Landfill Expansion is not located within an area of geology where sinkholes shallow limestone formations, unconfined/shallow aquifers, or karst conditions exist The nearest occupied residence is more than 2,000 feet from the MSW Landfill Expansion Cell Construction The principal elements of the MSW landfill disposal cell construction include the following (Figure 3): Base layer: Controlled Fill sandy to clayey materials utilized for construction of embankments, subgrades, berms 24 Clay Barrier Layer clay soils with minimum 1x10-7 cm/sec hydraulic conductivity are placed at specified physical characteristics of optimum moisture and compacted to achieve maximum density; these soils represent the base of the liner system and will be a minimum of 24 inches thick 60 mil High Density Polyethylene (HDPE) Geomembrane Liner the HDPE liner is placed on top the Clay Barrier Layer with welded seams. Drainage Layer soils with a minimum hydraulic conductivity of 1x10-3 cm/sec to convey leachate from on top the HDPE liner to the leachate collection trenches 12 Coarse ggregate gravel materials to promote leachate flow into the leachate collection trench piping; a synthetic geonet may be utilized in combination with the coarse aggregate. 12 Intermediate Filter ggregate placed between the coarse aggregate and drainage layer as a filter 12 Granular Drainage Layer MSW: waste is placed with daily cover provided Cover Cover Soils utilized for final cover and must provide a rooting zone for vegetation Topsoil the final, top layer of six inches for the final cover, berms and embankments for establishing vegetative cover Class 5 ggregate used for access roads The natural soil materials may be sourced on-site or borrowed from off-site sources as needed Leachate Collection and Management: See Figures 16 and 17 The Leachate Management Plan, submitted to the MPC concurrent with the ugust 2015 Permit application, includes design features, leachate handling procedures, leak detection, equipment maintenance activities, containment and diversion structures, and spill planning and response measures. s water percolates through the waste, leachate in the disposal cells forms and collects in the base liner system. Leachate is either pumped or drained via gravity to on-site leachate storage tanks. The Proposer loads leachate from the storage tanks into tanker trucks for transport offsite for treatment at the City of Crookston Wastewater Treatment Facility. Environmental ssessment Gentilly Township, Polk County, Minnesota 6 Worksheet

9 lternatively, the Proposer can spray leachate collected only from the ash disposal cells to control dust via a spray system. The Proposer will manage leachate from the MSW Landfill Expansion largely the same manner as the current system. However, the Proposer will add a new 50,000 gallon above ground storage (ST) tank to provide greater leachate storage capacity for the Facility. Leachate is generated from both the MSW and ash disposal areas, but stored in different underground storage tanks (USTs). The leachate management system associated with the MSW Landfill Expansion (Figure 18) will continue to keep the leachate from these distinct waste areas separate. Leachate management is regulated by permits from both the MPC and the City of Crookston Wastewater Treatment Facility which receives and treats landfill leachate. The primary operating components of the leachate management system include the following: Composite landfill cell liner system (clay barrier layer, synthetic layer, drainage layer, coarse aggregate, intermediate filter aggregate) Leachate collection trenches and transmission pipes (gravity and pressure flow) Sumps (capacity up to 17,500 gallons) Leak detection lysimeters installed beneath the lowest elevation of the leachate collection system the sumps) Routine scheduled monitoring of lysimeters for evidence of leachate Side-slope risers that do not penetrate the composite liner Flow meters, valves, pumps and controls Head monitors and level controls (solid waste rules specify leachate head monitoring and that the head-on-liner to be maintained at less than one-foot) Leachate quality monitoring in accordance with MPC and Crookston Waste Water Treatment Facility requirements Leachate line cleanout access points (leachate lines are cleaned [jetted] on a routine basis to minimize sediment buildup / fouling Manholes Holding tanks o Existing 15,000 gallon UST for the MSW leachate o o Existing 15,000 gallon UST for sh landfill leachate Proposed 50,000 gallon ST for leachate from the proposed MSW Landfill Expansion Leachate Loadout System (controls, piping, spill pad) Transport of leachate to a wastewater treatment plant via licensed hauler Landfill Gas Management The Proposer will annually evaluate the potential need to obtain an air permit and assess the need for an active gas extraction and destruction system. Based on projected landfill design volumes, that need is most likely to occur as the MSW landfill expands beyond proposed Phase 22 and into Phase 23, or in approximately the year Microbiological decomposition of landfilled solid waste generates gas that is regulated by both federal and state standards. Federal New Source Performance Standards (NSPS) require active landfills that exceed 50 megagrams per year of Non-methane Organic Compounds (NMOCs) to complete an air permit and review the need for implementing active gas collection destruction Environmental ssessment Gentilly Township, Polk County, Minnesota 7 Worksheet

10 systems. The Polk County Facility does not exceed this limit. The Proposer annually checks these calculations to account for annual waste volumes and ensure they are in compliance with permit limits. MPC solid waste regulations require landfill gas migration (compliance) monitoring. Within onsite occupied structures landfill gas, as measured as a percentage of the lower-explosive-limit (LEL), may not exceed 25% of the LEL. t the property boundary, the limit is 100% LEL. To control landfill gas migration, the Polk County MSW landfill areas is constructed with vertical passive gas vents placed into the waste. Typical vent design utilizes 6-inch diameter vent pipes installed within 36-inch diameter boreholes. The annulus around the vent pipe is coarse aggregate. The vent boreholes are sealed at the surface with bentonite and compacted clay to minimize potential air intrusion. The Proposer places passive gas vents at approximately one per acre, or at 200-foot spacing intervals. The Proposer will convert passive vents to an active gas collection system when and if the need for active gas collection arises. Industrial Stormwater Controls The MSW Landfill Expansion is designed to manage a 100-year, 24 hour, Type II storm event. This storm event of 6.31 inches of precipitation is based on National Oceanic tmospheric dministration tlas 14. This design exceeds the General Industrial National Pollutant Discharge Elimination System (NPDES) Stormwater rule requirements for a 25- year, 24 hour, Type II storm event. Stormwater controls consist of swales, downslope structures, perimeter ditches, and sedimentation ponds. Environmental Monitoring System The environmental monitoring system (EMS) for the Facility monitors both the open and closed portions of the Facility and accounts for each of the disposal areas with the exception of the closed demolition landfill area. Minor modification of the EMS will be coordinated with the MPC for the MSW Landfill Expansion. The primary components of the EMS is the groundwater monitoring network consisting of piezometers and monitoring wells for water elevation and groundwater quality performance standard monitoring. The groundwater component of the EMS is further addressed in Item 11.a.ii. Other components of the EMS include leak detection lysimeters, landfill gas monitoring, and stormwater monitoring as discussed above. Demolition Landfill The Proposer has submitted an application for a permit modification for the demolition landfill. The Proposer s planned modification includes the design of an additional horizontal footprint to the north of DD002 over the closed MSW landfill footprint of approximately 2.93 acres and vertically expanding over the current and proposed footprint by increasing the final permitted elevation of the demolition disposal area from to The MPC permitted demolition landfill at the Solid Waste Landfill Complex is a Class I demolition landfill and the Proposer has no plans to change the classification. Class I demolition landfills are restricted according to the types of waste material accepted. s such, the demolition wastes that can be disposed at the demolition landfill are those listed on the cceptable C&D Waste List within the MPC Demolition Landfill Guidance document (MPC, ugust 2005) and include such things as concrete, stone, untreated wood, masonry, siding, roofing materials, molded fiberglass, wood and vinyl flooring, etc. Environmental ssessment Gentilly Township, Polk County, Minnesota 8 Worksheet

11 The MPC permit for Class I demolition disposal areas do not require liners, leachate collection systems, gas management, or odor controls. The demolition landfill, both the existing and proposed disposal areas, are wholly located on top of the closed MSW disposal area (Figure 3). The proposed demolition landfill development includes a horizontal expansion of additional phases 5D, 6D, and 7D to the north of existing phases 1D - 4D, and a proposed vertical expansion over the entire demolition landfill footprint increasing the final permitted elevation. Because the demolition landfill is situated atop the closed MSW disposal area, the demolition waste will be placed on the four foot thick clay cap on the closed MSW disposal area. Preparation of the demotion area will consist of the stripping of topsoil and vegetation to expose the closed MSW landfill clay cap. With the topsoil and vegetation removed, the closed MSW landfill clay cap represents the base of the demolition landfill. When the demolition landfill is closed, the MPC permit requires a 24 soil final cover, of which the top six inches will be topsoil to sustain vegetation. Slopes on the final cover will range from 3 to 20% with stormwater erosion controlled by drainage swales, collection pipes, erosion control mats, and reinforced downslope structures. The MPC approved environmental monitoring system for the Solid Waste Landfill Complex is inclusive of all open and closed MSW landfill areas, the demolition landfill, ash landfill and composting area. There are no required changes to the environmental monitoring system with respect to the existing and proposed demolition landfill development. When operating the demolition landfill, the Proposer will follow MPC Demolition Landfill Guidance, the Operations and Maintenance Plan implemented by Polk County for the Solid Waste Landfill Complex, and the Industrial Solid Waste Management Plan (ISWMP). The ISWMP procedures include waste screening and waste rejection criteria that the Proposer follows when depositing only Class I demolition waste in the demolition landfill. The MPC permit requires that rejected wastes are directed to the MSW landfill or other appropriate off-site facilities. The MCP Permit Operations and Maintenance Plan includes the demolition landfill area and requires controlled site access, traffic control, security, inclement weather operations, waste inspections, surface water controls, temporary shutdown procedures, and routine inspections. s required by the MPC permit, on-going maintenance and mitigation is implemented as necessary to control litter, maintain roads and drainage features, correct erosion, and generally provide for efficient ongoing Solid Waste Landfill Complex operations in a controlled and efficient manner. The Proposer will maintain the operating record as required by the MPC for the Solid Waste Landfill Complex. This record documents wastes received, how waste was managed, monitoring and inspection results, and implemented contingency actions. The Proposer uses this record to generate annual reports submitted to the MPC. Gravel Mine The portion of the County Property identified for potential gravel mining is generally identified as the 115 acres situated immediately north of the existing and proposed Facility (Figure 4). The Environmental ssessment Gentilly Township, Polk County, Minnesota 9 Worksheet

12 excavated material will be used primarily for road construction projects with lesser quantities used for landfill work and other smaller projects. Conceptual Phasing of Gravel Mine Development of the County Property for gravel mining will be gradual and intermittent as dictated by County needs. The Proposer estimates that Polk County will undertake approximately five-miles of road construction annually. Conservatively, it is assumed that each mile of construction will require 8,000 cubic yards or approximately 40,000 cubic yards per year for road projects. n additional lesser quantity of material may also be used for landfill operations and other smaller projects. Thus, a conservative estimate of annual gravel use is 40,000 to 50,000 cubic yards of material. lthough soil borings and test pits have not specifically evaluated the gravel resources on the portion of the County Property proposed for gravel mining, hydrogeologic information from landfill permitting investigations, coupled with observations of the private gravel mining operations located immediately east and west of the County Property, suggest a minimum excavation depth of 15 feet. With the above assumptions, the conceptual phasing plan illustrated on Figure 4 will provide approximately 50,000 cubic yards of material per year for at least a 10-year period. ctual mining and crushing activities will generate a stockpile sufficient to accommodate several years of projected construction projects. Thus, over the course of a decade, actual mining, crushing, and stockpiling activities will likely occur three or four times. Between these active mining periods, the only mining related work will be the intermittent loading of trucks for projects. front-end loader may be stationed at the stockpile area during periods of more active loading of trucks for projects. Each illustrated phase in Figure 4 is approximately 300 feet square (2.1 acres) and 15 feet deep. Longer term gravel mining on the County Property beyond that illustrated will conceptually progress to the north and west, and be preceded by delineation of wetlands and any associated permitting and mitigation that will be required. The Proposer will evaluate viable materials through soil borings analysis to establish the long-term phasing and site management. Polk County will operate the Gravel Mine for its own use and include the following primary elements: The Proposer will mine sand and gravel in an open pit manner. Material excavation will most likely extend below the water table. There will be no gravel washing (a water appropriations permit will not be required). Mining operations will include, as needed, drag-line, backhoe, dozers, hoppers, conveyors, crushers, and screening equipment. Use of active mining equipment will occur intermittently to develop a stock pile of material for several years worth of projects (active mining equipment will not be permanently on-site). Environmental ssessment Gentilly Township, Polk County, Minnesota 10 Worksheet

13 The Proposer will use stockpiled material for County projects; primarily road construction with lesser quantities used for landfill operations and other county work. The Proposer will segregate and stockpile off-spec topsoil, clay, silt, and sands on County Property for other uses (such as landfill cover materials, berms, site restorations, etc.). The Proposer will use front-end loaders to load stockpiled material to truck for delivery to projects. minimum set back of 50 feet active management of screened and stocked soils the County Property. Stormwater erosion prevention and sediment control used as required by NPDES permitting. Mining and any active use of stockpiled materials will be limited to daylight work times. There will be no permanent infrastructure required for mining (permanent fueling stations, equipment maintenance facilities, offices, etc. will not be required). The Proposer will use mobile servicing units to fuel and maintain equipment during active mining, processing, and stockpiling. There will be no storage of hazardous materials, solvents, fuels or wastes on the Gravel Mine site. Site restoration. Gravel Mine magnitude Total Project creage 115 gravel mining area Linear project length Not applicable Number and type of residential units Not applicable Commercial building area (in square feet) Not applicable Industrial building area (in square feet) Not applicable Institutional building area (in square feet) Not applicable (existing landfill office, shop, equipment buildings, composting pad storage building and equipment, will remain in-place and unchanged) Other uses specify (in square feet) Not applicable Structure height(s) Existing single story structures The environmental monitoring system for the Solid Waste Landfill Complex is inclusive of all operating areas including the Gravel Mining. c. Explain the project purpose; if the project will be carried out by a governmental unit, explain the need for the project and identify its beneficiaries. Based on historic waste flow volumes, the existing MSW landfill facility will reach its ultimate capacity in approximately 19 years. However, due to a 2014 contractual change, the waste flow volumes from Beltrami County have increased. In addition, Hubbard County has a commitment to bring their wastes to Polk County beginning in July similar commitment is being considered by Red Lake County. Some waste from the Red Lake Nation has also historically been managed by the Polk County integrated waste management system. The increased volume, which is estimated to double from its current 30,000 cubic yards per year, will significantly reduce the MSW landfill life expectancy. Thus, the MSW Landfill Expansion will provide for longterm management of waste for the current five county regions of Beltrami, Clearwater, Environmental ssessment Gentilly Township, Polk County, Minnesota 11 Worksheet

14 Mahnomen, Norman, and Polk counties, plus Hubbard County beginning in July 2016, and is consistent with the solid waste management plans for each of these counties. dditionally, as previously noted, Red Lake County is exploring sending its waste to Polk County. Concurrent with this EW, Polk County has prepared for submittal to the MPC engineering plans and a Permit Modification Design Report (Wenck, ugust 2015) that provides design, phasing, and operational details that will incorporate the MSW Landfill Expansion into the Facility. Those plans and the Design Report also provide proposed modifications to the Demolition Debris Disposal rea and Compositing rea. There are no proposed changes to the ash landfill. MSW Landfill Expansion s described in Item 6.b., Polk County operates an integrated solid waste management system that currently serves the five county regions of Beltrami, Clearwater, Mahnomen, Norman, and Polk counties. These five counties form the Five County dvisory Board and meet regularly to address solid waste management issues of the region. The use of the Facility is consistent with the solid waste management plans for each county. Beginning July 1, 2016, Hubbard County will join the Five County dvisory Board. dditionally, contractual arrangements are being reviewed that will facilitate Red Lake County to send its waste to Polk County. Red Lake Nation is also expressing interest in joining with Beltrami County to manage their waste when Beltrami County transfer station facilities are complete. The MSW Landfill Expansion is of regional importance to manage, in an environmentally secure manner, for wastes the Proposer cannot otherwise manage through recycling, composting, or incinerated by the WTE facility. Thus, the beneficiaries of the Polk County integrated solid waste management system, and the Facility is the multi-county region and the waste streams from the citizens, industries, businesses, and public entities of the region. It is also noted that Polk County, and other portions of the region, is susceptible to flooding such that there are times when there is a more immediate need for disposal of items affected by the flood waters. The Facility provides for such circumstances when they arise. Gravel Mine Similar to adjacent properties to the east and west, the County Property also includes sand and gravel resources. lthough the Proposer has not completed detailed evaluation of the sand and gravel materials at the property, it is known through investigation of the southern portion of the County Property and from the adjacent gravel mining operations to the west and east, that viable gravel deposits are likely present on portions on the County Property. Mining of sand and gravel resources from the County Property will provide material for county road projects and landfill projects. The Proposer plans to use existing solid waste facility infrastructure for gravel mining and all material for county projects. Thus, the beneficiaries of the Gravel Mine will be all that utilize county roads and other infrastructure that may need gravel for construction and/or maintenance and the Facility that will serve six counties. Environmental ssessment Gentilly Township, Polk County, Minnesota 12 Worksheet

15 d. re future stages of this development including development on any other property planned or likely to happen? X Yes o No If yes, briefly describe future stages, relationship to present project, timeline and plans for environmental review. MSW Landfill Expansion The Proposer plans to expand the MSW landfill disposal area in phases over the next 60 years. The Proposer will expand the MSW landfill horizontally to the east of the current MSW disposal area of approximately 42 acres and vertically expanding over the current MSW disposal area by increasing the final permitted elevation from 1,088 to 1,122 feet. The long-range expansion plans will provide an additional site capacity of 4,008,100 cubic yards including daily, intermediate, and final cover requirements at the Facility. This EW review is on the expansion of Phases Phases 13 through 16 will add approximately acres or 1,233,800 cubic yards air space for the disposal of mixed municipal waste. The Proposer will submit separate draft EWs to the MPC for future expansions. Gravel Mine The Proposer has no additional gravel mining development plans beyond the proposed Facility. The Gravel Mine will provide materials for county road projects as well as material for landfill operations. Demolition Landfill The Proposer has no immediate plans at this time for future expansions of the demolition landfill area. e. Is this project a subsequent stage of an earlier project? X Yes o No If yes, briefly describe the past development, timeline and any past environmental review. MSW Landfill Expansion The MSW Landfill Expansion is a continuation of the existing MPC permitted MSW landfill operations at the Facility. The MPC issued the existing unlined MSW landfill Solid Waste Permit SW-124 in 1974 which began to accept waste in The original 45 acre portion of the existing MSW landfill was closed in the early 1990s. In 1992 Polk County was permitted to construct lined MSW cells to comply with new Minnesota and federal landfill design requirements. Since 1992, the MPC re-permitted the existing MSW landfill as required by MPC solid waste rules. The Proposer augmented the Facility with construction of demolition disposal, ash disposal, and composting facilities. Previous permitting and modifications to the existing MSW landfill has required hydrogeologic investigation and development of an MPC approved environmental monitoring system, but has not required completion of an EW since mandatory threshold categories were not exceeded. Phasing and Construction Schedule The long-range MSW Landfill Expansion plan is to have the landfill progress eastward from existing Phases 1-12 into proposed Phase 13 through Phases 24. Each of the proposed phases will have a footprint of approximately three to four acres and provide for approximately four to Environmental ssessment Gentilly Township, Polk County, Minnesota 13 Worksheet

16 six years of operating capacity. It is anticipated that the initial expansion of Phase 13 will be open for waste disposal in Based on projected waste volumes, the last Phase 24 will be open for waste disposal in The MPC permitting of solid waste facilities follows a 10-year permit cycle; thus, intermittent re-permitting with the MPC will occur over the projected life of the MSW landfill. The Proposer will construct each phase within the year preceding its target open date for waste disposal. Thus, construction will occur on an approximate 4 to 6 year schedule and be limited in area to roughly four acres for each phase of construction. Table 1 provides the MSW Landfill Design Volumes. Figure 3 illustrates the existing and proposed MSW Landfill disposal cells. Proposed Gravel Mine The proposed Gravel Mine is not a continuation of an earlier project. Demolition Landfill The Proposer, in accordance with an ugust 1996 pplication for Minor Permit Modification, developed a new demolition debris disposal area that was established over the original closed MSW disposal area at the site. The Proposer s previous demolition debris disposal area (DD001) near the landfill office was closed and the final cover was put in place in 1997.The existing facility did not require past environmental review due to no exceedance of mandatory threshold categories. 7. Cover Types: Estimate the acreage of the site with each of the following cover types before and after development: Both the MSW Landfill Expansion and Gravel Mine are located on portions of a contiguous 360 acre County Property. The entire MSW Landfill Expansion area consists of approximately 42 acres of waste disposal footprint with an approximate 16 acre buffer area to accommodate berms and stormwater controls. The MSW Landfill Expansion will abut and piggy-back over the eastern most portion of the existing MSW landfill. The Gravel Mine is situated immediately north of the existing Facility (see Figure3). In its entirety the proposed gravel mining area encompasses 115 acres within the contiguous 360 acre County Property. However, the Proposer will only mine a portion of the 115 acres due to the availability of viable material and the potential limitations of wetland areas. Environmental ssessment Gentilly Township, Polk County, Minnesota 14 Worksheet

17 Cover Type Before fter Cover Type Before fter Wetlands (landfill area)* Lawn/landscaping (included below in impervious surface and 0 0 mixed land use) Wetlands (Gravel Mine)** Ditch / Dug Pond(s) Deep water/streams 0 0 Impervious surface and mixed land use (buildings; road surfaces; support areas) Wooded/forest Landfill*** Brush/Grassland Cropland 0 0 Gravel Mine** Deep water/streams 0 0 TOTL * Wetland acreage for MSW Landfill Expansion based on surveyed wetland delineations. ** Wetland acreage for Gravel Mine estimated; the extent of gravel mining and potential impact on wetlands, if any, is undetermined and fter acreage assumes full gravel mining development, which is unlikely. *** Inclusive of all landfill areas (open, closed, demolition, ash disposal). Note that the yard waste and source separated organics composting area is located atop closed MSW Landfill as is a significant portion of the demolition waste disposal area 8. Permits and pprovals Required: List all known local, state and federal permits, approvals, certifications and financial assistance for the project. Include modifications of any existing permits, governmental review of plans and all direct and indirect forms of public financial assistance including bond guarantees, Tax Increment Financing and infrastructure. ll of these final decisions are prohibited until all appropriate environmental review has been completed. See Minnesota Rules, Chapter Unit of Government Type of pplication Status Minnesota Pollution Control gency (MPC) MPC MPC Individual Solid Waste Permit General Construction Stormwater NPDES Permit General Industrial NPDES Stormwater Permit for the Facility Submitted To be submitted Existing; will be revised as needed Polk County Conditional Use Permit Existing Environmental ssessment Gentilly Township, Polk County, Minnesota 15 Worksheet

18 City of Crookston Wastewater Treatment greement Existing West Polk Soil & Water Conservation District; Corps. of Engineers West Polk Soil & Water Conservation District; Corps. of Engineers West Polk Soil & Water Conservation District; Corps. of Engineers West Polk Soil & Water Conservation District; Corps. of Engineers Wetland Jurisdictional Determination (Landfill Expansion) Wetland Replacement / Compensatory Permitting (Landfill expansion) Wetland Jurisdictional Determination (Gravel Mine) Wetland Replacement / Compensatory Permitting (Gravel Mine) Submitted To be submitted To be submitted pending need To be submitted pending need Cumulative potential effects may be considered and addressed in response to individual EW Item Nos. 9-18, or the RGU can address all cumulative potential effects in response to EW Item No. 19. If addressing cumulative effect under individual items, make sure to include information requested in EW Item No Land Use: a. Describe: i. Existing land use of the site as well as areas adjacent to and near the site, including parks, trails, prime or unique farmlands. The 360 acre County Property that encompasses the MSW Landfill Expansion and Gravel Mine is situated in a rural area approximately 8-miles east of the city of Crookston, 9.5-miles southwest of the city of Red Lake Falls, and 3-miles east-southeast of the unincorporated community of Gentilly. U.S. Highway 2 is one mile to the south (Figure 2). The Facility occupies the southwestern portion of the 360 acre County Property, while the northern and eastern portions are currently undeveloped, have historically been used for grazing livestock, and contain a mixture of grassland, wetland and wooded areas with some previously established trails and dug ponds. (See Figure 5) There are no parks or public trails adjacent to the County Property. Surrounding properties and land use to the north, east, and west includes agricultural cropland, pastureland, and private gravel mining operations. South of the County Property is open undeveloped land that extends to U.S. Highway 2. Over one-mile to the southeast of the County Property, and south of Highway 2, is the Glacial Ridge National Wildlife Refuge. The refuge was established in 2004 and is an assemblage of land owned by the Minnesota Department of Natural Resources (MDNR), U.S. Fish & Wildlife Service (USFWS) and the Nature Conservancy. t 24,000 acres, Glacial Ridge National Wildlife Refuge is currently the nation s largest prairie and wetland restoration project. Figure 6 depicts the proximity of the County Property to MDNR, USFWS, and Nature Conservancy Property. Environmental ssessment Gentilly Township, Polk County, Minnesota 16 Worksheet

19 The Proposer identified prime farmland soils using data from the United States Department of griculture (USD). The Code of Federal Regulation 7 CFR 657 defines the farmland classifications with prime farmland defined as land that has the best combination of physical and chemical characteristics for producing food and crops. Farmland of statewide importance is defined as land, in addition to prime and unique farmlands, for the production of food and crops based on criteria determined by state agencies. s shown in Figure 7, approximately one-half of the MSW Landfill Expansion and a small portion of the Gravel Mine is classified as either Prime Farmland or as Farmland of Statewide Importance. In accordance with the Farmland Protection Policy ct (FPP), federally funded projects require identification and avoidance of potential impacts to prime farmlands. Under FPP, if a project does not use federal funding, as is the case with this Project, then no further action beyond identifying potential prime farmland impacts is required. ii. Plans. Describe planned land use as identified in comprehensive plan (if available) and any other applicable plan for land use, water, or resources management by a local, regional, state, or federal agency. The Project is consistent with its intended current use and future land use plans. iii. Zoning, including special districts or overlays such as shoreland, floodplain, wild and scenic rivers, critical area, agricultural preserves, etc. The Project does not affect special districts or overlays. The proposed use of the County Property for landfilling activities is consistent with its current use and gravel mining is compatible with similar activities on adjacent properties to the east and west. The Proposer will use materials from the Gravel Mine for county road projects. The Proposer will benefit from mining gravel materials through reduction in the amount of imported construction materials needed for the landfill. b. Discuss the project s compatibility with nearby land uses, zoning, and plans listed in Item 9a above, concentrating on implications for environmental effects. Both the MSW Landfill Expansion, Demolition Landfill Expansion, and the Gravel Mine area are compatible with the existing land use on the County Property and of the adjacent properties. The Proposer has operated the existing landfill operations at the County Property since 1975 in accordance with MPC Solid Waste Permit SW-124. The northern portion of the County Property remains largely undeveloped with the exception of some excavated ponds. The Proposer s gravel mining plans are consistent with adjacent private properties to the east and west. c. Identify measures incorporated into the proposed project to mitigate any potential incompatibility as discussed in Item 9b above. None Environmental ssessment Gentilly Township, Polk County, Minnesota 17 Worksheet

20 10. Geology, Soils and Topography/Land Forms: a. Geology - Describe the geology underlying the project area and identify and map any susceptible geologic features such as sinkholes, shallow limestone formations, unconfined/shallow aquifers, or karst conditions. Discuss any limitations of these features for the project and any effects the project could have on these features. Identify any project designs or mitigation measures to address effects to geologic features. The Proposer conducted, and MPC reviewed, numerous geologic investigations at the Facility for prior solid waste permitting efforts. The location is well suited for a landfill from both a site specific and regional perspective. Regionally, there are no shallow limestone formations, karst features such as sinkholes, disappearing streams or caves, or other geologic conditions that will limit the use of the County Property for either the MSW Landfill Expansion or Gravel Mine. In accordance with MPC solid waste facility rules, landfill permitting includes a four-phase hydrogeologic investigation process that builds from review of regional information, through detailed site investigations that often involve test pits, soil borings and installation and use of monitoring wells. t the culmination of the four-phase hydrogeologic investigation process the Proposer installed a monitoring system and with a MPC approved monitoring plan. The Proposer completed the initial hydrogeologic investigation for the Facility in 1972, followed by subsequent investigations in 1988, 1993, and 2001 as the Facility footprint was enlarged and the monitoring network updated to accommodate the permitted waste disposal area. Most recently, the Proposer completed an investigation in 2014 for the proposed MSW Landfill Expansion summarized in the following documents. Phase I Hydrogeologic Report and Phase II Investigation Work Plan (Wenck, January 2014). Phase II Hydrogeologic Investigation Report and Phase III Work Plan (Wenck, ugust 2014). Revised Phase III Hydrogeologic Evaluation- Proposed Expansion Site (Wenck, pril 2015) The below sections summarize the regional and site geologic conditions as documented in the above documents. Regional Geologic Conditions The County Property is located in the Red Lake River Watershed, near the eastern extent of what was once glacial Lake gassiz with its sand, clay, and silt deposits, and localized lenses of sand and gravel. Beneath the lake deposits are older glacial deposits with discontinuous buried sand and gravel deposits that may provide for water supplies. The uppermost bedrock consists of cretaceous shales and/or sandstones and occurs at a depth of approximately 350 feet. majority of the County is relatively flat with its soils formed over loamy calcareous till or lacustrine lake plain sediments. The southeastern most portion of the County has greater topographic relief from glacial moraines. Natural surface elevations of the County Property range from approximately 1,020 to 1,030 feet, National Geodetic Vertical Datum. Environmental ssessment Gentilly Township, Polk County, Minnesota 18 Worksheet

21 County Property The geologic conditions on the County Property have been defined from the numerous investigations have established the following three primary geologic units. Silty to sandy clay till (near surface Upper Till Zone); Sand and gravel outwash (Outwash Deposit); and Very dense silty to clayey sand till (Buried Till) Upper Till Zone The uppermost unit throughout the extent of the existing and MSW Landfill Expansion is silty to sandy clay till. It is typically light brown to gray, with trace gravel. It is at least 19.5 feet in thickness in the north-eastern portions of the MSW Landfill Expansion area and appears to gradually pinch out to the south and east. Soil borings on the southeastern and eastern boundary of the MSW Landfill Expansion site encountered fine-grained sand deposits only two to three feet below clayey topsoil. Outwash Zone Below the upper clay till zone are deposits of fine to coarse-grained sand and gravel. This zone is believed to be a glacial outwash deposit and, groundwater is present throughout this zone. This deposit is present in all soil borings conducted at the MSW Landfill Expansion site. Fine-grained sand or clayey fine-grained sand (i.e., SP or SC), was present in the majority of borings directly below the upper clay till. The outwash deposit generally becomes coarser with depth. Included in this zone are deposits of well-graded, coarse-grained sand and gravel (i.e., SW and GW). The depth and thickness of this outwash deposit contrasts to that of the upper clay till layer, as it is more prevalent in the south and east portions of the site. In general, the outwash deposit is typically 15 to 30 feet thick. Buried Till Layer The sand and gravel outwash is underlain by very dense silty to clayey sands (i.e., SM and SC). Ranging from brown to gray in color, this zone is typically comprised of fine to medium-grained sand with silt and clay and traces of gravel. The nature of this deposit suggests that is it likely a buried glacial till layer. This very dense, finer textured deposit is consistently between 30 to 40 feet below ground. This deposit is relatively thick and was not penetrated to the termination boring depths (61 feet and 66 feet) during phase II of the 2014 investigation. In addition to defining the geologic conditions at the site, the MPC hydrogeologic investigation process also defines the groundwater conditions and establishes an environmental monitoring system of which groundwater monitoring is a primary component. Groundwater conditions are addressed in Item 11.a.ii. b. Soils and topography - Describe the soils on the site, giving NRCS (SCS) classifications and descriptions, including limitations of soils. Describe topography, any special site conditions relating to erosion potential, soil stability or other soils limitations, such as steep slopes, highly permeable soils. Provide estimated volume and acreage of soil excavation and/or grading. Discuss impacts from project activities (distinguish between construction and operational activities) related to soils and topography. Identify measures during and after project construction to address soil limitations including stabilization, soil corrections or other measures. Erosion/ sedimentation control related to stormwater runoff should be addressed in response to Item 11.b.ii. Environmental ssessment Gentilly Township, Polk County, Minnesota 19 Worksheet

22 Polk County lies within the Red River Valley with the Red River forming its western boundary. majority of the County is relatively flat with its soils formed over loamy calcareous till or lacustrine lake plain sediments. The southeastern most portion of the County has greater topographic relief from glacial moraines. The relatively flat topography and the nature of the soils are such that steep slopes or significant erosion concerns do not exist for the County Property associated with the proposed projects. The soils present at the County Property are shown on Figure 8 and briefly described below. Clearwater Series: The Clearwater Series is present on portions of both the MSW Landfill Expansion and gravel mining sites. The Clearwater Series consists of fine-clayey very deep, poorly and very poorly drained soils, the soils have moderate to slow permeability. Slope ranges from 0 to 2%, and surface runoff is slow to very slow. Reis Series: The Reis Series is present on portions of both the MSW Landfill Expansion and gravel mining sites. The Reis Series consists of fine-clayey very deep, poorly drained soil with slow permeability. Slope ranges from 0 to 2%, and runoff is low to medium. Hout Series: The Hout Series is present at the MSW Landfill Expansion site only. The Hout Series consist of sandy-clayey very deep moderately well drained soils formed in loamy and sandy sediments. Slopes range from 0 to 3%, surface runoff is very low. Permeability is moderately rapid in upper sandy horizon and slow in underlying material. Hamre Series: The Hamre Series is present at the MSW Landfill Expansion site only. The Hamre Series consists of fine-loamy very deep very poorly drained soils. Slopes range from 0 to 1% surface runoff is very low to ponded permeability is moderate to moderately slow. Thief River Series: The Thief River Series is present at the MSW Landfill Expansion site only. The Thief River Series consist of fine sandy-clayey loam very deep poorly drained soils. Slopes range from 0 to 2%, and runoff is negligible. Permeability ranges from moderately rapid to rapid in the upper sandy horizon and slow in the lower clayey horizon. Hedman Series: The Hedman Series is present in the gravel mining site only. The Hedman Series consists of coarse-loamy very deep, poorly to very poorly drained soils. Slopes range from 0 to 2%, permeability is moderate, and runoff is slow of ponded. Fram Series: The Fram Series is present in the gravel mining site only. The Fram Series consists of coarse-loamy very deep, somewhat poorly drained soils. Slopes range from 0 to 3%, runoff is negligible to medium depending on slope, and permeability is moderate. Strathcona Series: The Strathcona Series is present in the proposed gravel mining site only. The Strathcona Series consists of sandy-loamy very deep, very poorly drained soils. Slopes range from 0 to 2%, and runoff is negligible to very low or ponded. Permeability is moderately rapid to rapid in the upper horizon and moderate to moderately slow in the lower horizon. Kratka Series: The Kratka Series is present only at the gravel mining site. The Kratka Series consists of sandy-loamy very deep, and very poorly drained soils. Slopes range from 0 to 2 %, and runoff is negligible. Permeability is moderately rapid to rapid in upper horizon, and moderately rapid to moderately slow in lower horizon. Environmental ssessment Gentilly Township, Polk County, Minnesota 20 Worksheet

23 Landfill construction work will occur in phases as individual landfill cells are constructed, filled and subsequently closed in first an interim and later a final manner. The Proposer will manage all soil on County Property and obtain a General Construction Stormwater NPDES Permit for erosion prevention and sediment control during construction (11.b.ii). The MPC permit requires routine inspections to maintain and repair erosional controls during its operational life and post closure period. Landfill design incorporates designated slopes, drainage controls, and establishment of vegetated cover. The overall grading associated with the MSW Landfill Expansion includes the 42 acre waste disposal footprint and the 16 acre perimeter to accommodate berms, drainage ways, and stormwater management structures. The Proposer will conduct gravel mining in a phased manner over many years as needed to accommodate county road construction projects and landfill operation needs. Therefore, the quantity of excavation that occurs in any one year will be highly variable. The estimate provided in Item 6.b. indicates excavation to occur in phases of approximately 2.1 acres per year as illustrated on the conceptual phasing plan (Figure 4). The Proposer will conduct gravel mining and screening on an intermittent basis in anticipation of up-coming county projects where they may process and stockpile material for anticipated projects for the future year(s). NOTE: For silica sand projects, the EW must include a hydrogeologic investigation assessing the potential groundwater and surface water effects and geologic conditions that could create an increased risk of potentially significant effects on groundwater and surface water. Descriptions of water resources and potential effects from the project in EW Item 11 must be consistent with the geology, soils and topography/land forms and potential effects described in EW Item Water Resources: a. Describe surface water and groundwater features on or near the site in a.i. and a.ii. below. i. Surface water - lakes, streams, wetlands, intermittent channels, and county/judicial ditches. Include any special designations such as public waters, trout stream/lake, wildlife lakes, migratory waterfowl feeding/resting lake, and outstanding resource value water. Include water quality impairments or special designations listed on the current MPC 303d Impaired Waters List that are within 1 mile of the project. Include DNR Public Waters Inventory number(s), if any. The County Property is located in the Red Lake River Watershed (Figure 9). The Gentilly River lies approximately 1 mile west of the County Property and Kripple Creek approximately 1.5 miles north. Both the Gentilly River and Kripple Creek are tributaries to the Red Lake River, with their confluence approximately 3 miles west of the County Property. There are no lakes or county drainage ditches in the immediate vicinity, nor are there any impaired waters within one mile of the County Property. Figure 10 illustrates the waterways and potential wetland areas near the County Property. The County Property has a few dug ponds and shallow drainage ditch features. The Facility perimeter ditches collect and control runoff. The outlet from the County Property is located at the western edge of the current property and drains approximately one-half mile to the southwest via an unnamed waterway to it confluence with the Gentilly River (Figure 10). Wetlands also exist on the County Property within portions of both the proposed MSW Landfill Expansion and Gravel Mine areas. Item 11.b.iv. below describes wetland delineation work and potential impacts to wetlands on the County Property. Environmental ssessment Gentilly Township, Polk County, Minnesota 21 Worksheet

24 ii. Groundwater aquifers, springs, seeps. Include: 1) depth to groundwater; 2) if project is within a MDH wellhead protection area; 3) identification of any onsite and/or nearby wells, including unique numbers and well logs if available. If there are no wells known on site or nearby, explain the methodology used to determine this. Regional Regional groundwater flow is to the west-northwest toward the Red Lake River, which joins the Red River approximately 30 miles downstream at East Grand Forks, Minnesota. The main regional groundwater recharge area is located in the rolling uplands in the southeast part of the watershed, while the lake plain to the west is an area of regional discharge. The County Property is located in an area of local recharge of deeper groundwater resources as well as a discharge area of a shallow water table. Recharge occurs in the higher beach ridges discharge probably occurs intermittently in local wetlands. Deeper buried glacial outwash gravel deposits at depths of 100 to 250 deep supply water to the region. County Well Index records identify the following private wells near the County Property. Figure 11 shows the location of these wells. Owner Unique Well # Depth (ft bgs) Use Vivian, Scott Domestic Reitmeier &Boll Cattle Opferken, Dick Domestic USGS Observation Reitmeier, Leroy Cattle Reitmeier, Leroy Cattle Lanetot, Tom Domestic Delange, Ronald Domestic USGS Monitoring well The city of Crookston public water supply well field is located within the Glacial Ridge Wildlife Refuge. These four wells pipe water along Highway 2 to Crookston for distribution. In addition to the City wells, there are several other high capacity wells in the area. high capacity well requires an MDNR water appropriations permit if it pumps in excess of 10,000 gallons per day or 1 million gallons a year. Figure 12 illustrates the proximity of the high capacity wells near the County Property, and well information from the County Well Index is provided below: Environmental ssessment Gentilly Township, Polk County, Minnesota 22 Worksheet

25 Well Name Unique Well # Depth (ft) Completed Crookston Cattle Co Crookston Cattle Co Crookston Cattle Co Crookston Cattle Co Crookston Well Crookston Well Crookston Well Crookston Well Date Drilled Swedes Snowsled Inn not known not known wellhead protection plan was prepared for the city of Crookston well-field to facilitate land-use planning to protect public water supplies from land uses that potentially pose a risk to water supplies. Figure 13 shows the wellhead protection area generated from that plan. The regional groundwater flow direction is westerly which places the Crookston well field upgradient of the County Property and the MSW Landfill Expansion and Gravel Mine. Based on the regional westerly flow direction there is limited groundwater capture area to the west (downgradient) of the supply wells. The Facility does not encroach upon the Crookston well field Wellhead Protection rea. ccording to the Minnesota Department of Health (MDH) the wellhead protection plan is scheduled for an amendment (update) in the fourth quarter of Project Site On the County Property, groundwater occurs approximately 2 to 20 feet below ground surface and is present in both the Upper Till Zone and Outwash Zone. Item 10.a. above describes these units. The MPC approved monitoring network at the Facility includes wells and piezometers screened in both the Upper Till Zone and Outwash Zone. Table 2 summarizes the current monitoring program and Figure 14 shows the monitoring well locations. Minor modifications to the monitoring network have been required over time as the Facility operations have been expanded. The MSW Landfill Expansion will similarly require modification of the monitoring network with the sealing of some monitoring wells and the installation of new monitoring points. The anticipated changes to accommodate the MSW Landfill Expansion include the eventual sealing of wells MW-5 and MW-204 and the installation of a MW-205 nest of two wells. pproval by the MPC is required for any modification to the monitoring program, and a licensed well contractor will complete all well work, according to the MDH Well Code. The Proposer or its contractor measures groundwater elevations routinely in accordance with the solid waste permit. The Proposer has observed fluctuations up to nine feet in response to wet and dry climatic periods. However, the groundwater flow direction has remained consistent from the southeast to the northwest. Vertical flow within the Outwash Zone has historically shown a slight upward flow potential as determined by measuring Environmental ssessment Gentilly Township, Polk County, Minnesota 23 Worksheet

26 water elevations at nested wells; an upward flow potential limits the potential downward movement of potential groundwater impacts to deeper groundwater zones. The groundwater monitoring network for the Facility as a whole provide for the early detection of potential impacts that may emanate from all portions the operation including the MSW Landfill Expansion. The above summary of groundwater conditions is based on information from the monitoring network associated with the Facility that occupies the southern portion of the County Property. Given consistent topography, the Proposer expects groundwater conditions on the northern and southern portions of the County property to be similar. b. Describe effects from project activities on water resources and measures to minimize or mitigate the effects in Item b.i. through Item b.iv. below. i. Wastewater - For each of the following, describe the sources, quantities and composition of all sanitary, municipal/domestic and industrial wastewater produced or treated at the site. 1) If the wastewater discharge is to a publicly owned treatment facility, identify any pretreatment measures and the ability of the facility to handle the added water and waste loadings, including any effects on, or required expansion of, municipal wastewater infrastructure. MSW Landfill Expansion Leachate is wastewater generated from the landfill. Leachate is caused principally by precipitation or snowmelt percolating through the disposed waste, or inherent moisture within the waste, which drains to the bottom of the landfill where it is collected. Leachate is primarily water with concentrations of metals, volatile organic compounds and other organic and inorganic constituents. Item 6.b. describes how the Proposer currently manages leachate. The Proposer plans to manage leachate at the proposed MSW Landfill Expansion in the same manner as the current operations. However, the facility will add a proposed 50,000 gallon above ground storage tank (ST) that will provide greater leachate storage capacity. The volume of leachate generated at a landfill is a factor of precipitation, moisture content of the waste, and the amount of open landfill area. The latter factor is important in minimizing overall leachate generation rates. The Facility as a whole currently averages approximately 1.6 million gallons per year. The Proposer s calculations predict leachate generation to increase because of the MSW Landfill Expansion, but will then remain stable over the course of the landfill operations. s cells reach their targeted elevations, first intermittent and then final cover construction is completed which minimizes the infiltration of precipitation through the waste mass and thus reduce leachate generation. Because the MSW Landfill Expansion will minimize the general size of open waste area to the extent possible, while still maximizing the utility of landfilling space, the MSW leachate generation rate is Environmental ssessment Gentilly Township, Polk County, Minnesota 24 Worksheet

27 projected to remain fairly stable 2.5 to 2.8 million gallons per year. The ash disposal area generates much lesser leachate (380,000 to 420,000 gallons per year).thus, the total leachate volume for the Facility will range from approximately 2.8 to 3.2 million gallons per year. This volume of leachate is comparable with the leachate generation volumes at other MSW facilities in the state of Minnesota. s described in Item 6.b., the Proposer currently directs leachate collected from the lined waste cells to the leachate USTs. In accordance with an agreement between Polk County and the city of Crookston (ppendix C), the Proposer loads leachate from the USTs into tanker trucks for transport off-site for treatment at the City of Crookston Waste Water Treatment Facility. licensed hauler transports the leachate to the wastewater treatment plant with the typical volume of approximately 6,200 gallons per load. In accordance with the MPC Solid Waste permit, the Proposer may spray leachate on the ash landfill to control dust via a spray system. Gravel Mine The Gravel Mine will not generate wastewater. The Proposer will manage sanitary waste associated with workers at the landfill offices and/or with portable facilities serviced by independent wastewater services. The Demolition Landfill will not generate wastewater. 2) If the wastewater discharge is to a subsurface sewage treatment systems (SSTS), describe the system used, the design flow, and suitability of site conditions for such a system. Not applicable 3) If the wastewater discharge is to surface water, identify the wastewater treatment methods and identify discharge points and proposed effluent limitations to mitigate impacts. Discuss any effects to surface or groundwater from wastewater discharges. Not applicable ii. Stormwater - Describe the quantity and quality of stormwater runoff at the site prior to and post construction. Include the routes and receiving water bodies for runoff from the site (major downstream water bodies as well as the immediate receiving waters). Discuss any environmental effects from stormwater discharges. Describe stormwater pollution prevention plans including temporary and permanent runoff controls and potential BMP site locations to manage or treat stormwater runoff. Identify specific erosion control, sedimentation control or stabilization measures to address soil limitations during and after project construction. The Proposer designed the landfill to contain a 100-year, 24-hour, Type II storm event of 6.31 inches that is more stringent than the 25-year storm event required by rules. The Proposer included design features such as swales, downslope structures, perimeter ditches, and sedimentation ponds. The Proposer submitted a Permit Modification Design Report, design plans and construction specifications to the MPC for review and approval. Environmental ssessment Gentilly Township, Polk County, Minnesota 25 Worksheet

28 The MPC will issue a NPDES general Construction Stormwater Permit for the MSW Landfill Expansion and the Gravel Mine to address temporary construction impacts. fter construction is complete both the MSW Landfill Expansion, Demolition Landfill Expansion, and gravel mining operations are covered under the facilities existing NPDES Stormwater Permit and Stormwater Pollution Prevention Plan (SWPPP). The SWPPP contains erosion prevention and sediment control best management practices (BMPs) designed specific to the site. BMPs will control stormwater, minimize erosion, and prevent impacts to adjacent surface water bodies. The Proposer will direct stormwater runoff from gravel mining to the interior of the excavation. Controls will be necessary around stockpiles and adjacent operational areas. For the MSW Landfill Expansion, stormwater controls incorporate drainage swales and terraces designed to provide flows not exceeding a maximum velocity of five feet per second during peak condition. Designed downslope drainage structures will accept flow from the drainage swales and terraces, and carry the water down the slope without causing erosion. The Proposer will line each downslope drainage structure with geotextile and use graded rock riprap to prevent erosion. lternatively, the Proposer may install a permanent erosion stabilization mat with the appropriate resistance to shear stress and velocity. Each downslope structure discharges into a sedimentation pond or stilling basin. iii. Water appropriation - Describe if the project proposes to appropriate surface or groundwater (including dewatering). Describe the source, quantity, duration, use and purpose of the water use and if a MDNR water appropriation permit is required. Describe any well abandonment. If connecting to an existing municipal water supply, identify the wells to be used as a water source and any effects on, or required expansion of, municipal water infrastructure. Discuss environmental effects from water appropriation, including an assessment of the water resources available for appropriation. Identify any measures to avoid, minimize, or mitigate environmental effects from the water appropriation. There will be no water appropriation for either the MSW Landfill Expansion or the Gravel Mine. Gravel washing is not proposed. In accordance with the Minnesota Department of Health (MDH) well code, a licensed well contractor will seal monitoring wells MW-5 and MW-204 to accommodate the MSW Landfill Expansion. pproval by the MPC is required for any modification to the monitoring program. iv. Surface Waters a) Wetlands - Describe any anticipated physical effects or alterations to wetland features such as draining, filling, permanent inundation, dredging and vegetative removal. Discuss direct and indirect environmental effects from physical modification of wetlands, including the anticipated effects that any proposed wetland alterations may have to the host watershed. Identify measures to avoid (e.g., available alternatives that were considered), minimize, or mitigate environmental effects to wetlands. Discuss whether any required compensatory wetland mitigation for unavoidable wetland impacts will occur in the same minor or major watershed, and identify those probable locations. Environmental ssessment Gentilly Township, Polk County, Minnesota 26 Worksheet

29 Wetlands exist on the County Property within both the MSW Landfill Expansion and Gravel Mine. The MSW Landfill Expansion project will impact wetlands, and Polk County has initiated discussions regarding wetland mitigation options. Wetland impacts may also potentially occur from gravel mining depending on the extent of mining that may occur. Following the guidelines of the Minnesota Wetland Conservation ct, the Proposer completed a wetland delineation for the MSW Landfill Expansion area and submitted a Notice of pplication to the West Polk Soil and Water Conservation District in pril The Soil and Water Conservation District is the assigned local governmental unit (LGU) for the area. On June 17, 2015 members of the Technical Evaluation Panel (TEP) conducted a site review to reach consensus on the delineation of all potentially impacted the wetland boundaries. Based on the site review, the TEP made a minor modification to the wetland delineations. The final delineated wetland boundaries are summarized below and illustrated on Figure 15. MSW Landfill Expansion rea Wetland ID rea (acres) Wetland Type Proximity to Proposed Landfill Expansion rea Wetland 0.34 Type 2; Excavated Basin within Expansion rea Wetland B 0.14 Type 2; Excavated Basin within Expansion rea Wetland C 0.12 Type 2; Excavated Basin within Expansion rea Wetland D Type 2/6: Wet- Mesic Prairie/Shrub-Carr 13.8 acres within Expansion rea Source: "Wetland Delineation Report" (Wenck, March 2015) & Technical Evaluation Panel review The initial phases of the MSW Landfill Expansion will occur in the western most portion of the proposed expansion area which includes Wetlands, B and C. s these are small excavated (man-made) basins, the need for wetland replacement/mitigation will be made by the LGU and the U.S. rmy Corps of Engineers (USCE). Subsequent phases of landfilling to the east will eventually encroach upon Wetland D. The Proposer will address these subsequent phases in future EWs. The timing of potential impacts to Wetland D is dependent upon waste volume inflow to the landfill from the region. s waste flow is variable, a specific timeframe cannot be established as to when direct impacts will be expected; however, it will be many years after the start of landfilling in the initial phases targeted to begin in The Proposer has begun appropriate steps to establish wetland replacement and compensatory permitting with the LGU and USCE for Wetland D. The Proposer has not delineated wetland areas for the northern portion of the County Property that includes the gravel mining operation. The likely presence of wetlands on that portion of the County Property is evident from the Proposer s review of the National Wetland Inventory (NWI) mapping information. The conceptual phasing plan for gravel mining (Figure 4) as described in Item 6.b. avoids Environmental ssessment Gentilly Township, Polk County, Minnesota 27 Worksheet

30 the potential wetland areas represented by NWI information and will likely provide for at least a decade of gravel mining. However, field verification will be required to delineate the actual presence and boundaries of wetlands on that portion of the property. If the extent of gravel mining encroaches upon the delineated boundary of wetlands, the Proposer must replace and conduct compensatory permitting. The steps to wetland replacement and compensatory permitting will essentially follow those the Proposer completed for the MSW Landfill Expansion area. b) Other surface waters- Describe any anticipated physical effects or alterations to surface water features (lakes, streams, ponds, intermittent channels, county/judicial ditches) such as draining, filling, permanent inundation, dredging, diking, stream diversion, impoundment, aquatic plant removal and riparian alteration. Discuss direct and indirect environmental effects from physical modification of water features. Identify measures to avoid, minimize, or mitigate environmental effects to surface water features, including in-water Best Management Practices that are proposed to avoid or minimize turbidity/sedimentation while physically altering the water features. Discuss how the project will change the number or type of watercraft on any water body, including current and projected watercraft usage. There are no anticipated physical effects or alterations to lakes, streams, ponds, or waterways off the County Property. There are physical alterations as to the management of surface water on the County Property as the system of stormwater management features that incorporate swales, downslope structures, perimeter ditches and sedimentation ponds all designed for a 100-year, 24 hour, Type II storm event that exceeds rule requirements for sedimentation pond design. 12. Contamination/Hazardous Materials/Wastes: a. Pre-project site conditions - Describe existing contamination or potential environmental hazards on or in close proximity to the project site such as soil or ground water contamination, abandoned dumps, closed landfills, existing or abandoned storage tanks, and hazardous liquid or gas pipelines. Discuss any potential environmental effects from preproject site conditions that will be caused or exacerbated by project construction and operation. Identify measures to avoid, minimize or mitigate adverse effects from existing contamination or potential environmental hazards. Include development of a Contingency Plan or Response ction Plan. There are no pre-project conditions that will expose contamination of hazardous materials or wastes. The nearest gas utility pipeline is located approximately one-half mile north of the northern boundary of the County Property. The MSW Landfill Expansion will extend eastward from the existing lined landfill cells and other areas of the Facility onto previously undisturbed ground. Landfill design incorporates engineered controls that will tie-in the proposed cells into existing infrastructure. The integrated solid waste management system and solid waste management plan of Polk County and other counties provide for separate hazardous waste management for proper disposal. The Facility does not accept hazardous wastes for disposal and the Proposer does not generate hazardous waste. Environmental ssessment Gentilly Township, Polk County, Minnesota 28 Worksheet

31 Similarly, the Gravel Mine is situated on County Property that has not previously been disturbed and the Proposer does not anticipate gravel mining operations to generate hazardous wastes. b. Project related generation/storage of solid wastes - Describe solid wastes generated/stored during construction and/or operation of the project. Indicate method of disposal. Discuss potential environmental effects from solid waste handling, storage and disposal. Identify measures to avoid, minimize or mitigate adverse effects from the generation/storage of solid waste including source reduction and recycling. The Proposer will generate limited quantities of waste during phased construction of landfill cells. Such wastes will likely be limited to cut-offs of piping and liner materials, as well as some waste from on-site workers. On-going operations will also likely generate small quantities of waste. Thus, the Proposer expects a minimal volume of waste to be disposed of, as necessary, on-site within the active landfill phase. Wastes associated with Gravel Mine operations will also be extremely small and limited to what workers may generate during active mining, screening and stockpiling operations. c. Project related use/storage of hazardous materials - Describe chemicals/hazardous materials used/stored during construction and/or operation of the project including method of storage. Indicate the number, location and size of any above or below ground tanks to store petroleum or other materials. Discuss potential environmental effects from accidental spill or release of hazardous materials. Identify measures to avoid, minimize or mitigate adverse effects from the use/storage of chemicals/hazardous materials including source reduction and recycling. Include development of a spill prevention plan. The Proposer will use hazardous materials or chemicals at the County Property for landfill and gravel mining operations in small quantities of solvents, lubricants, hydraulic fluids, cleaning agents, and fuels that are necessary to maintain and service equipment. These materials are stored and used at the existing office/shop and equipment storage buildings in the southwestern corner of the County Property as well as the storage building/shop that is centrally located to landfill operations (Figure 3). Two 1,000 gallon STs are located at the shop. The Proposer maintains a Spill Prevention Control and Countermeasure (SPCC) plan at the Facility to address the storage, management and spill response actions as may be necessary. Leachate is contained within the liner system and sumps where it is transferred by gravity and pumps into the two existing 15,000 gallon double-walled USTs located just west of the centrally located storage building/shop adjacent to the leachate loadout facility. The MSW Landfill Expansion includes construction of a new 50,000 gallon ST adjacent to the two existing USTs and leachate loadout facility. The ST be constructed of glass lined metal panels, with a cathodic protection corrosion control system. The proposed tank will be built on a concrete foundation with secondary containment and centrally located. Environmental ssessment Gentilly Township, Polk County, Minnesota 29 Worksheet

32 d. Project related generation/storage of hazardous wastes - Describe hazardous wastes generated/stored during construction and/or operation of the project. Indicate method of disposal. Discuss potential environmental effects from hazardous waste handling, storage, and disposal. Identify measures to avoid, minimize or mitigate adverse effects from the generation/storage of hazardous waste including source reduction and recycling. 12.c. above discusses the limited use of potentially hazardous materials or chemicals at the Facility. Potential adverse environmental effects of these materials are mitigated by limiting quantities stored at the Facility and by the Proposer following label instructions in use, storage and disposal. Management of potentially hazardous materials is also addressed in SPCC plan and SWPPP. licensed recycling company will manage spent cleaning solvents and not disposed of on-site. 13. Fish, Wildlife, Plant Communities, and Sensitive Ecological Resources (rare features): a. Describe fish and wildlife resources as well as habitats and vegetation on or in near the site. reas of Polk County are in three of Minnesota s biomes: Central and eastern Polk County are part of the deciduous forest biome and are characterized by many lakes and forested areas, while western Polk County is part of the prairie grassland biome and includes more agricultural areas. North-central Polk County is part of the tallgrass aspen parkland. The normal annual temperature is degrees Fahrenheit and average annual rainfall is inches. The area that encompasses the County Property is characterized primarily by wet prairie, wet-brush prairie, mesic prairie (normal moisture; neither wet nor dry) with scattered aspen woodland. Through cultivation and/or grazing much of the land in this region was converted to agricultural use. Item 9 above describes development of a number sand and gravel mines in the area including property immediately to the east and northwest of the Gravel Mine. The natural prairies are largely associated with the flat, poorly drained topography of the Glacial Lake gassiz Inter-beach area that includes the County Property. The mesic prairie is habitat to a wide variety of native grasses and forbs such as big bluestem, Indian grass, switchgrass, purple prairie clover, prairie phlox, and blazing star among others. The wet prairie areas are habitat for prairie cordgrass, bog reed-grass, blue joint and a variety other sedges. Such prairie habitats are typically fire dependent to maintain their grassland plant diversity and prevent transition to brushland and eventually forest. Fish resources are largely absent on and near the County Property because permanent bodies of water are largely absent. s noted in Item 11, the Gentilly River and Kripple Creek are located approximately 1 mile west and 1.5 miles north of the County Property respectively, with tributary drainages to these waterways nearer to the County Property (see Figure 10). Wildlife resources near the County Property are those associated with the mix of prairie, brush, aspen woodlots and agriculture and include game species such as white-tail deer, sharp-tailed grouse, ruffed grouse, and waterfowl. The prairie habitats include a wide variety of resident and migratory non-game birds such as sand-hill crane, greater prairie chicken, shorebirds (sandpipers, godwits, plover, and rail), songbirds, raptors plus various mammals, reptiles, amphibians, and insects. Environmental ssessment Gentilly Township, Polk County, Minnesota 30 Worksheet

33 Prior to European settlement in the late 1800s, more than 18 million acres of Minnesota were prairie. t that time prairie comprised the largest ecosystem in North merica. ccording to the MDNR, less than 2% of the native prairie in Minnesota remains in fragmented areas including portions of Polk County. The County Property is within a Prairie Core rea identified in the Minnesota Prairie Conservation Plan (The Nature Conservancy, et. al. June 2011) which is a 25-year strategy to accelerate conservation of core area and provide for habitat corridors between the core areas. The Proposer will not present the Facility for use as a core area. s previously mentioned in Item 9.a., the Glacial Ridge National Wildlife Refuge is located a couple of miles southeast of the County Property (Figure 6). The project began in 2000 with the acquisition of 2,000 acres by the Nature Conservancy. In partnership with over 30 organizations including Polk County, Red Lake County, area municipalities, universities, foundations, and state and federal agencies. The refuge (formally established in 2004) has grown to approximately 24,000 acres, is currently the largest prairie and wetland restoration project in the United States and the545 th National Wildlife Refuge in the United States. pproximately 12% of the 24,000 acres was native prairie with the other acreage used for crop production, grazing and gravel mining. In its restoration, over 19 miles of ditches filled within the refuge boundaries to restore the hydrology. b. Describe rare features such as state-listed (endangered, threatened or special concern) species, native plant communities, Minnesota County Biological Survey Sites of Biodiversity Significance, and other sensitive ecological resources on or within close proximity to the site. Provide the license agreement number (L- ) and/or correspondence number (ERDB # ) from which the data were obtained and attach the Natural Heritage letter from the DNR. Indicate if any additional habitat or species survey work has been conducted within the site and describe the results. The Proposer submitted a Natural Heritage Information System (NHIS) database query request to the MDNR to determine if any rare species or significant natural features are known within approximately one mile of the County Property. The results of this query indicate some rare features have been documented within the search area and that the County Property may impact native prairie remnants. ppendix contains the letter from the MDNR with the Natural Heritage Review. s discussed in the MDNR letter, portions of the County Property are within the boundary of an area of Moderate Biodiversity Significance as mapped by the Minnesota Biological Survey. The MDNR considers sites of Moderate ranking to have one or more of the following characteristics: 1) the occurrence of a rare species; 2) moderately disturbed native plant communities; and/or, 3) strong potential for recovery. For the Gravel Mine portion of the County Property, the NHIS database query identified imperiled or vulnerable native plant communities associated with Wet Brush-Prairie and wet and mesic prairie of the gassiz Interbeach Prairie Complex as present. The query categorized the condition of these prairie habitats for ecological integrity (composition and abundance of native species) as being poor to good for the Gravel Mine area. Similarly, the MSW Landfill Expansion portion of the County Property also includes wet and mesic prairie of the gassiz Interbeach Prairie Complex with fair to poor condition ranking. The lower condition ranking for both proposed project areas is because of historical grazing or overgrazing prior to county Environmental ssessment Gentilly Township, Polk County, Minnesota 31 Worksheet

34 ownership of the property. In addition to these prairie habitats, the greater prairie chickens have been recorded to use the section of land in which the County Property is located. The MDNR biodiversity ranking information referenced above is based partially on interpretation of 2008 aerial photography of the County Property and from ground surveys completed in 1999 and 2010 for portions of the proposed Gravel Mine and MSW Landfill Expansion reas respectively. The Natural Heritage Review (ppendix ) provides a listing of identified animals and plants within the area and may be present at the proposed project sites. This listing includes greater prairie chicken, northern-long eared bat, short-eared owl, upland sandpiper, yellow rail, marbled godwit, and Wilson s phalarope. Because ground survey information is not available for all of proposed project areas, the MDNR Natural Heritage Review recommends conducting a ground survey to better identify potential impact to rare features that may be present. c. Discuss how the identified fish, wildlife, plant communities, rare features and ecosystems may be affected by the project. Include a discussion on introduction and spread of invasive species from the project construction and operation. Separately discuss effects to known threatened and endangered species. By excavation and expansion of the landfill footprint and demolition landfill area, the Proposer anticipates these activities may potentially impact the native prairie remnants and associated rare species that may be present. ctive landfill construction and gravel mine excavation may interrupt breeding activities of birds or animals such as the pril 1 May 15 booming period of the greater prairie chicken. Both proposed projects will occur in a gradual phased manner over many years as discussed in Item 6, such that habitat loss will be gradual and incremental. The extent of gravel mining will be limited to those portions of the site that have viable material. Long-term, landfill closure and restoration of gravel mining areas will provide the opportunity to reclaim or enhance the County Property with surface water and wetland features seeding to reestablish native wet and mesic prairie plant communities that characterize the Glacial Lake gassiz Inter-beach prairie habitats. Other past projects resulted in reclamation of significant portions of the Glacial Ridge Wildlife Refuge.. Neither the MSW Landfill Expansion, Demolition Landfill Expansion, nor gravel mining, will introduce or spread invasive species. On-going site maintenance will control noxious or invasive weeds and specified plantings with appropriate native plants during landfill cell closure, mining area reclamation will exclude invasive species. d. Identify measures that will be taken to avoid, minimize, or mitigate adverse effects to fish, wildlife, plant communities, and sensitive ecological resources. number of measures will be available to minimize potential adverse effects of landfilling, and gravel mining. The Proposer will time significant intermittent work activities such as earth moving, mining, crushing and stockpiling of gravel to avoid breeding and nesting seasons. Preliminary site preparation work, such as mowing prior to a nesting season, will also discourage use of a parcel of property where earth-work is schedule to occur. Environmental ssessment Gentilly Township, Polk County, Minnesota 32 Worksheet

35 Continued implementation of established operational protocols also work to minimize potential effects to wildlife and ecological resources. The Proposer will follow the following protocols: Maintain established daylight work hours Limit ingress and egress to specified routes Use and maintain established on-site traffic routes Maintain site security to minimize the potential for unauthorized access and property use for off-road TVs, dirt bikes, or other activities Limit open working areas (landfill cells or gravel mining areas) Provide appropriate cover of buried waste to minimize the draw to varmints and predators such as skunks, raccoons, and carrion eating birds, which could increase predation on nesting birds and mammals Complete site reclamation with native plant communities Maintain stormwater management Complete site maintenance activities without due delay 14. Historic Properties: Describe any historic structures, archeological sites, and/or traditional cultural properties on or in close proximity to the site. Include: 1) historic designations, 2) known artifact areas, and 3) architectural features. ttach letter received from the State Historic Preservation Office (SHPO). Discuss any anticipated effects to historic properties during project construction and operation. Identify measures that will be taken to avoid, minimize, or mitigate adverse effects to historic properties. The Proposer checked with the State Historic Preservation Office (SHPO) to determine if there were any known historic structures, archeological sites, and/or traditional cultural properties on or in close proximity to the Projects. The response from the SHPO indicated that there were no archaeological sites or historic structures identified in a search of the Minnesota rchaeological Inventory and Historic Structures Inventory for the area of the Projects. ppendix B includes the SHPO response. 15. Visual: Describe any scenic views or vistas on or near the project site. Describe any project related visual effects such as vapor plumes or glare from intense lights. Discuss the potential visual effects from the project. Identify any measures to avoid, minimize, or mitigate visual effects. The existing Facility and MSW Landfill Expansion and Demolition Landfill Expansion will not generate any adverse visual effects such as vapor plumes or intense lighting. The natural ground surface elevation is approximately 1,020 to 1,030 and the maximum proposed landfill elevation is approximately 1,120. With the surrounding land use being agricultural and gravel mining, adverse visual effects to neighboring properties will not occur. Because the standard open hours of the Facility are 7:00 am to 4:00 pm, lighting is not required for operations. Thus the only outside lights are the yard-lights by the office for security. Extended daylight hours may occur during periods of landfill cell construction, but any need for lighting will be very short term, if at all. Environmental ssessment Gentilly Township, Polk County, Minnesota 33 Worksheet

36 The Gravel Mine will also not cause any adverse visual effects. Because of the relatively flat topography of the area, the Proposer does not anticipate scenic views or vistas to be impeded by construction activities on the County Property. 16. ir: a. Stationary source emissions - Describe the type, sources, quantities and compositions of any emissions from stationary sources such as boilers or exhaust stacks. Include any hazardous air pollutants, criteria pollutants, and any greenhouse gases. Discuss effects to air quality including any sensitive receptors, human health or applicable regulatory criteria. Include a discussion of any methods used assess the project s effect on air quality and the results of that assessment. Identify pollution control equipment and other measures that will be taken to avoid, minimize, or mitigate adverse effects from stationary source emissions. Landfill gas is composed of approximately 50-55% methane, 40-45% carbon dioxide, a small percentage of hydrogen sulfide and the balance by nonmethane organic compounds (NMOCs). Landfill gas management specified in the federal NSPS requires active landfills to not emit greater than 50 megagrams per year of NMOCs. If the NMOC emissions exceed this threshold, an application for an air permit must be prepared and implementation of active gas collection and destruction investigated. The Proposer performs annual calculations to confirm compliance and the calculations for the Polk County Facility indicate that it falls below the threshold that requires an air permit or active gas collection. However, as noted in Item 6.b. passive landfill gas vents are currently present at the site and the Proposer will install additional passive vents (which the Proposer can convert to active vents as needed) as part of the Project. The Demolition Landfill Expansion is not expected to generate significant air emissions. Vehicle emissions - Describe the effect of the project s traffic generation on air emissions. Discuss the project s vehicle-related emissions effect on air quality. Identify measures (e.g. traffic operational improvements, diesel idling minimization plan) that will be taken to minimize or mitigate vehicle-related emissions. The MSW Landfill Expansion and Demolition Landfill Expansion will not produce significant additional traffic that will cause congestion, idling or require any traffic management improvements to adjacent roadways. While the Project will increase truck traffic from the current 15 per day to an estimated 30 per day, the Proposer does not anticipate congestion and excessive idling by the limited traffic on the existing rural roadways. Item 18 discusses vehicle traffic on adjacent roadways. Similarly, the Gravel Mine will only intermittently generate additional traffic during off-site county road construction or intermittent special projects. Ingress and egress of trucks for gravel mining operations will utilize a separate entrance to the eastern portion of the County Property near the off-site mining operations on the east side of County Property. The Proposer will use heavy equipment for excavation, material placement, grading and hauling during periods of landfill cell construction and closure, or gravel mining. Operators and contractors will minimize construction related emissions by properly maintaining equipment.. Environmental ssessment Gentilly Township, Polk County, Minnesota 34 Worksheet

37 b. Dust and odors - Describe sources, characteristics, duration, quantities, and intensity of dust and odors generated during project construction and operation. (Fugitive dust may be discussed under item 16a). Discuss the effect of dust and odors in the vicinity of the project including nearby sensitive receptors and quality of life. Identify measures that will be taken to minimize or mitigate the effects of dust and odors. The Proposer does not expect dust generation from traffic to and from the County Property because the adjacent roadways, as well as the entrance to the Facility are all paved. However, dust generation may occur during routine landfill operations, landfill cell construction, and from gravel mining. dverse impacts during construction and operation of both landfill and gravel mining activities will be mitigated by limiting open excavations, soil stockpiling to active construction areas only, backfilling and restoration of excavations in a timely manner, and seeding of areas to establish vegetation. Dust control on roadways internal to the County Property will also mitigate dust. Overall, the MPC anticipates potential dust impacts to be minimal and isolated to the immediate area County Property. Odor impacts associated with the Facility greatly minimized by the rural location of the facility with few nearest receptors that are located a half-mile or more to the west and northwest. The Proposer may mitigate odors associated with MSW waste using daily, intermittent and final cover as appropriate on individual landfill cells. No odor issues will be associated with the proposed Gravel Mine. 17. Noise: Describe sources, characteristics, duration, quantities, and intensity of noise generated during project construction and operation. Discuss the effect of noise in the vicinity of the project including 1) existing noise levels/sources in the area, 2) nearby sensitive receptors, 3) conformance to state noise standards, and 4) quality of life. Identify measures that will be taken to minimize or mitigate the effects of noise. The rural location, lack of nearby receptors, hours of operation (7:00 am to 4:00 pm) and extensive buffer afforded by the County Property are such that noise related impacts are, and will continue to be negligible. Surrounding current land uses include agricultural land and gravel mining to the east and west with the nearest residence approximately over one-third mile from the County Property. Thus, the landfill operations, and gravel mining will not generate adverse noise impacts. Nonetheless, potential mitigating measures to minimize noise will be applicable to activities on the County Property. Such measures include adhering to normal operating hours and proper maintenance of equipment. 18. Transportation: a. Describe traffic-related aspects of project construction and operation. Include: 1) existing and proposed additional parking spaces, 2) estimated total average daily traffic generated, 3) estimated maximum peak hour traffic generated and time of occurrence, 4) indicate source of trip generation rates used in the estimates, and 5) availability of transit and/or other alternative transportation modes. Traffic related aspects related to the proposed activities for the County Property are minimal and associated with truck traffic for waste disposal to and from the Facility. With the increase in Environmental ssessment Gentilly Township, Polk County, Minnesota 35 Worksheet

38 waste from adjacent counties, the Proposer anticipates daily waste hauling traffic to increase from approximately 15 to an estimated 30 loads per day. Truck traffic occurs primarily from midmorning to mid-afternoon. Some additional traffic will also occur in hauling gravel during the occasional off-site county road construction projects. Figures 1 and 2 illustrate adjacent roadways. Table below depicts the average annual daily traffic (DT) counts for adjacent roadwaysto demonstrate the negligible effect of traffic associated with the County Property projects. Road/Highway Identifier lternate Identifier DT (year) Co. Rd th ve. SW 85 (2009) Notes N-S road west of Co. Property and primary access to site U.S. Hwy (2013) E-W U.S. Highway Co. Rd th St. SW 280 (2013) E-W road north of County Property Co. Rd (2013) t Gentilly, northwest of Co. Property Co. Rd th ve. SW 75 (2013) N-S road east of Co. Property Source: Minnesota Department of Transportation b. Discuss the effect on traffic congestion on affected roads and describe any traffic improvements necessary. The analysis must discuss the project s impact on the regional transportation system. If the peak hour traffic generated exceeds 250 vehicles or the total daily trips exceeds 2,500, a traffic impact study must be prepared as part of the EW. Use the format and procedures described in the Minnesota Department of Transportation s ccess Management Manual, Chapter 5 (available at: or a similar local guidance, s noted above, the Proposer anticipates effects from the Project to be negligible and is not planning congestion or traffic improvements. c. Identify measures that will be taken to minimize or mitigate project related transportation effects. None based on 18.b. above. 19. Cumulative Potential Effects: (Preparers can leave this item blank if cumulative potential effects are addressed under the applicable EW Items) a. Describe the geographic scales and timeframes of the project related environmental effects that could combine with other environmental effects resulting in cumulative potential effects. Development of the MSW Landfill Expansion and the other operational areas at the Facility will not result in potential cumulative effects associated with management of wastes within the region. The MSW Landfill Expansion will provide for effective waste management for an estimated 62 years for a significant region of northwestern Minnesota that currently includes Beltrami, Clearwater, Mahnomen, Norman, and Polk Counties. Beginning in 2016, the Facility will manage Hubbard County waste. Operation of the Facility is consistent with the solid waste Environmental ssessment Gentilly Township, Polk County, Minnesota 36 Worksheet

39 management plans for these counties. In addition, Red Lake County is exploring sending its waste to Polk County. Thus, continued use of the Facility, in coordination with the other components of the integrated solid waste management system, maximizes the benefit of the existing infrastructure and limits the potential need to establish other new landfill space in Polk County or other counties in the region. The Proposer anticipates that demand for gravel in the region will not increase as a result of gravel mining on the County Property. Further, gravel mining will minimize the need for importing such materials from other properties in the region. The gravel from the Gravel Mine will provide the County with a needed resource to maintain its transportation infrastructure. The Proposer will also use mined gravel at the Facility. The Gravel Mine is consistent with the private gravel mining operations in adjacent areas. There is some cumulative effect of removing native plant communities from construction of the MSW Landfill Expansion and Gravel Mine. However, long-term management of the properties will include reclamation with native plant communities. Other nearby projects have incorporated similar reclamation work in the Glacial Ridge National Wildlife Refuge. Development of the Demolition Landfill Expansion will not result in potential cumulative effects associated with management of wastes within the region. The Demolition Landfill Expansion provides for effective waste management for a significant region of northwestern Minnesota that currently include Beltrami, Clearwater, Mahnomen, Norman, and Polk Counties. The continued use of the Facility, in coordination with the other components of the integrated solid waste management system, maximizes the benefit of the existing infrastructure and limits the potential need to establish other new landfill space in Polk County or other counties in the region. Surface Waters The County Property is located in the Red Lake River Watershed. The Gentilly River lies approximately 1 mile west of the County Property and Kripple Creek approximately 1.5 miles north. Both the Gentilly River and Kripple Creek are tributaries to the Red Lake River, with their confluence approximately 3 miles west of the County Property. There are no lakes or county drainage ditches in the immediate vicinity, nor are there any impaired waters within one mile of the County Property. The Facility s stormwater control system first collects stormwater runoff into a series of sedimentation ponds that are sized for complete retention of the 100-year, 24-hour storm event. The County Property has a few dug ponds and shallow drainage ditch features. The Facility perimeter ditches collect and control runoff with the outlet from the County Property located at the western edge of the current property and draining approximately one-half mile to the southwest via an unnamed waterway to it confluence with the Gentilly River. Sedimentation ponds will treat stormwater from the Facility before being discharged offsite. The MPC is not aware of any other known regulated point source discharges in the sub-watershed around the facility. Environmental ssessment Gentilly Township, Polk County, Minnesota 37 Worksheet

40 Groundwater Quality In unlined areas of the landfill, leachate can potentially percolate downwards and/or laterally away from the refuse source in the unlined area of the landfill, transporting inorganic and organic contaminants that may result in a plume of landfill-affected groundwater. The Proposer in accordance with the solid waste permit has completed groundwater quality monitoring at 13 monitoring wells. The monitoring includes inorganic and volatile organic parameters. Detections of inorganic parameters above water quality standards in some groundwater samples include arsenic, boron, manganese and selenium. lthough these analyses may be naturally occurring, follow-up work will be required to ascertain the source and as necessary implement ameliorative measures. The Proposer has completed monitoring for volatile organic compounds (VOCs). Except in some very limited circumstances, VOC are not naturally occurring. Two (2) of the 13 monitoring wells tested at the landfill detected the presence of VOCs (ethyl ether and dichlorofluoromethane). The detection VOCs were at very low levels near the laboratory-reporting limit, below established water quality criteria, and attributed to the old closed and unlined portion of the landfill. Over time, the monitoring program has not identified a trend of declining groundwater quality. The installation of the double HDPE composite liner in the active landfill area should prevent any potential off-site migration, and if there is any leakage, would be detected by leak detection lysimeters to be installed as part of the proposed expansion. The Proposer or its contractor measures groundwater elevations routinely in accordance with the solid waste permit. The Proposer has observed fluctuations up to nine feet in response to wet and dry climatic periods. However, the groundwater flow direction has remained consistent from the southeast to the northwest. Vertical flow within the Outwash Zone has historically shown a slight upward flow potential as determined by measuring water elevations at nested wells; an upward flow potential limits the potential downward movement of potential groundwater impacts to deeper groundwater zones. The groundwater monitoring network for the Facility as a whole provide for the early detection of potential impacts that may emanate from all portions the operation including the MSW Landfill Expansion. There are no other projects known to exist near the Facility expected to contribute significantly to area groundwater contamination. No cumulative effects on local groundwater are expected. ir Quality Impacts The impacts to air quality associated with the Facility are generally limited to greenhouse gas emissions, odors, fugitive dust, and noise. There are no other projects currently proposed in the area that would further affect air quality. Landfill gas vented to the atmosphere through passive vents installed at the landfill disposal areas. This allows the reduction of potentially explosive atmospheres within the landfill waste refuse. Currently, the landfill is not large enough to produce measureable quantities of landfill gas that would make the installation by the Proposer of an active gas collection system economically feasible or required by rule. n active collection system would reduce landfill methane emissions Environmental ssessment Gentilly Township, Polk County, Minnesota 38 Worksheet

41 by producing carbon dioxide emissions instead through combustion. Based on the above, the MPC does not expect significant cumulative air impacts. Odors Odor impacts associated with the Facility greatly minimized by the rural location of the Facility with few nearest receptors that are located a half-mile or more to the west and northwest. The Proposer recognizes that odors can be associated with MSW waste and can be mitigated by several methods of landfill operation. Most notable of these used by the Proposer is the use of daily, intermittent and final cover as appropriate for individual areas of the landfill. In addition, landfill gas management and the potential use of solar flares on passive gas vents can minimize odors. Routine site inspections by the Proposer and the MPC can also identify potential leachate seeps. No odor issues will be associated with the proposed Gravel Mine. Dust The Proposer does not expect dust to be generated by traffic to and from the County Property because the adjacent roadways, as well as the entrance to the Facility are all paved. Dust can be generated during both routine landfill operations and landfill cell construction events and for gravel mining. dverse impacts during construction and operation of both landfill and gravel mining activities are mitigated by limiting open excavations, soil stockpiling to active construction areas only, backfilling and restoration of excavations in a timely manner, and seeding of areas to establish vegetation. Dust control by the Proposer on roadways internal to the County Property will also mitigate dust. Overall, the Proposer expects potential dust impacts to be minimal and isolated to the immediate area County Property. Noise The rural location, lack of nearby receptors, hours of operation (7:00 am to 4:00 pm) and extensive buffer afforded by the County Property are such that noise related impacts are, and will continue to be negligible. Surrounding current land uses include agricultural land and gravel mining to the east and west with the nearest residence approximately over one-third mile from the County Property. Thus the landfill operations and Gravel Mine will not generate adverse noise impacts. Land Use The Facility is located on a contiguous 360 acre Polk County owned property in Section 26 of Gentilly Township, eight miles east of Crookston. The Project is located within this land parcel and will not involve the occupation of additional land. The Proposer has identified three issues as potentially posing cumulative effects issues with respect to land resources wildlife habitat, row crop agriculture, and traffic. The MPC does not expect the proposed expansion to alter the existing conditions in a significant manner with respect to these areas. Wildlife Habitat There is some cumulative effect of removing native plant communities from the area associated with both the MSW Landfill Expansion and Gravel Mine. However, long-term management of the properties by the Proposer includes reclamation with native plant communities. Similar reclamation work was successfully implemented in the area in association with the Glacial Ridge National Wildlife Refuge. Environmental ssessment Gentilly Township, Polk County, Minnesota 39 Worksheet

42 Both the MSW Landfill Expansion and Gravel Mine may impact the native prairie remnants and associated rare species that are present through excavation and expansion of the landfill footprint. ctive landfill construction and gravel mine excavation will potentially interrupt breeding activities of birds or animals such as the pril 1 May 15 booming period of the greater prairie chicken. It is noted that both proposed Projects will occur in a gradual phased manner over many years as discussed in Item 6, such that habitat loss is gradual and incremental. The proposer will limit the extent of gravel mining is limited to those portions of the site that have viable material. Long-term, landfill closure and restoration of gravel mining areas will provide the opportunity to reclaim or enhance the County Property with surface water and wetland features seeding to reestablish native wet and mesic prairie plant communities that characterize the Glacial Lake gassiz Inter-beach prairie habitats. Similar reclamation efforts were implemented on significant portions of the Glacial Ridge Wildlife Refuge. Neither the MSW Landfill Expansion nor Gravel Mine will introduce or spread invasive species. Ongoing site maintenance will control noxious or invasive weeds and specified plantings with appropriate native plants during landfill cell closure, mining area reclamation will exclude invasive species. The Proposer has a number of measures available to minimize potential adverse effects of landfilling and gravel mining. Significant intermittent work activities such as earth moving, mining, crushing and stockpiling of gravel, is timed to avoid breeding and nesting seasons. Continued implementation of established operational protocols also work to minimize potential effects to wildlife and ecological resources. b. Describe any reasonably foreseeable future projects (for which a basis of expectation has been laid) that may interact with environmental effects of the proposed project within the geographic scales and timeframes identified above. There is no foreseeable future gravel mining on the County Property beyond what is proposed. The Facility, as proposed, will provide for waste management of the region for approximately 62 years based on projected waste volumes. The EW will be reviewing the Proposers MSW Landfill Expansion plans. The MPC will be reviewing the expansion of Phases 13 through 16 in the EW. Phases 13 through 16 will add approximately acres or 1, cubic yards air space for the disposal of mixed municipal waste. Beyond that time frame there is a potential for additional landfill expansion on the County Property. In this extended interim timeframe; waste types, waste generation rates, and the means to manage waste materials may change in ways that cannot be foreseen. Based on past and current operations of the Polk County integrated solid waste management system, it can reasonably be assumed that the system will evolve to manage waste in the most effective means reasonably possible. ll future expansions at the Facility maybe subject to environmental review prior to the issuance of any state or local permits and before construction can begin. There is the potential for additional Demolition Landfill Expansion on the County Property as demand arises. Environmental ssessment Gentilly Township, Polk County, Minnesota 40 Worksheet

43

44 Figure 1 Kittson County Roseau County Marshall County Pennington County Grand Forks County Polk County Landfill Location Red Lake County Traill County Norman County Mahnomen County rea of Detail Cass ± County Clay County Miles Path: L:\0546\0058\MXD\EW\County Location Map.mxd Date: 1/21/2016 Time: 3:44:04 PM User: KacHD0606 Sources: Esri, HERE, DeLorme, USGS, Intermap, increment P Corp., Becker NRCN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, MapmyIndia, OpenStreetMap County contributors, and the GIS User Community POLK COUNTY JN 2016 Regional Location Figure 1

45 Figure Site Location Marshall County rea of Detail Pennington County Gentilly 7.5 Minute Quadrangle (USGS: 19782) Marcoux Corners 7.5 Minute Quadrangle (USGS: 1982) Harold 7.5 Minute Quadrangle (USGS: 1965) Dugdale 7.5 Minute Quadrangle (USGS: 1965) 4,000 2, ,000 Path: L:\0546\0058\MXD\EW\Site Location Map.mxd Date: 1/19/2016 Time: 4:10:24 PM User: KacHD0606 Feet ± Polk County Norman Mahnomen County County Copyright: 2013 National Geographic Society, i-cubed POLK COUNTY JN 2016 Site Location Map Figure 2

46 Figure 3

47 Figure 3a

48

49 Figure 4 J I H G F E D C B 2014 erial Photograph (Source: MN GEO) Path: L:\0546\0058\MXD\EW\Proposed Gravel Mine Wetlands.mxd Date: 1/19/2016 Time: 4:31:39 PM User: KacHD0606 Feet ± POLK COUNTY Legend Landfill Features ctive Demolition Landfill pproximate Closed MSW Landfill Boundary Closed Demolition Landfill MSW Combuster sh Landfill Existing MSW Disposal rea Landfill Expansion Options Polk County Landfill Propery Boundary Yard Waste Composting Facility and Source Separated Organics Potential Gravel Mining Operation Conceptual Phasing Streams National Wetland Inventory Lakes (MN) JN 2016 Proposed Gravel Mine - Conceptual Phasing Figure 4

50 GROVE DONLD & CHERYL TH ST SW BOLL BRYN TH VE SW BOLL BRYN TH VE SW LNGLOIS WILLIM J TRUSTEE TH ST SW BOLL BRYN TH VE SW NELSON NTHN & EMILY TH ST SW LNGLOIS WILLIM J TRUSTEE TH ST SW CYMBLUK DOUGLS L TH ST SW Figure 5 PTENUDE ROBERT W TH VE SW BOLL BRYN TH VE SW PTENUDE ROBERT TH VE SW BOLL BRYN J TH VE SW POLK COUNTY 612 BRODWY ST N PTENUDE MRION J 2530 WOODRIDGE LNE R J ZVORL & SONS, INC PO BOX 435 POLK COUNTY 612 N BRODWY SUITE 207 POLK COUNTY 612 BRODWY ST N PTENUDE SUZNNE RIVERSIDE DR PTENUDE MRION J 2530 WOODRIDGE LNE GENTILLY CTTLE, LLC TH VE SW HOILND RICHRD & RICHRD HOILND JR 425 S WSHINGTON ST NTURE CONSERVNCY & MN FIELD OFFICE 1101 W RIVER PKY SUITE 200 NTURE CONSERVNCY & MN FIELD OFFICE Tax Parcel 1101 W RIVER SUITE 200 Polk County Landfill ProperyPKY Boundary Legend Landfill Features ctive Demolition Landfill GENTILLY CTTLE, LLC TH VE SW pproximate Closed MSW Landfill Boundary Closed Demolition Landfill MSW Combuster sh Landfill 2014 erial Photograph (Source: MN GEO) Feet GENTILLY CTTLE, LLC Path: L:\0546\0058\MXD\EW\County TH VE SW Property and djacent Parcels.mxd Date: 1/19/2016 Time: 4:27:04 PM User: KacHD0606 ± Existing MSW Disposal rea Potential Gravel Mining Location Landfill Expansion Options POLK COUNTY JN 2016 County Property and djacent Properties Figure 5

51 Figure 6 Belgium WM Legend Pembina WM Polk County Landfill Property Boundary Nature Conservancy Land USFWs Managed Land (Including Glacial Ridge National Wildlife Refuge) DNR Managed Land Moran WM Huot WM Stipa WM Landfill Property Marcoux WM Mentor Prairie WM Kertsonville WM GLCIL RIDGE NTIONL WILDLIFE REFUGE Tympanuchus WM Tilden WM Dugdale WM Thorson Prairie WM Oak Ridge Marsh WM Shypoke WM Trail WM POLK COUNTY WTERFOWL PRODUCTION RE Burnham WM Path: L:\0546\0058\MXD\EW\USFS and DNR Lands.mxd Date: 1/19/2016 Time: 4:37:00 PM User: KacHD0606 Miles ± Maple Meadows WM Woodside WM Chicog WM 2 Godfrey WM Onstad Sources: Esri, HERE, WM DeLorme, USGS, Intermap, increment P Corp., NRCN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, MapmyIndia, OpenStreetMap contributors, and the GIS User Community POLK COUNTY JN 2016 Glacial Ridge and DNR Lands Figure 6

52 50th St SW Figure th ve SW Legend Polk County Landfill Propery Boundary Landfill Features Prime Farmland (NRCS) ll areas are prime farmland Farmland of statewide importance 2014 erial Photograph (Source: MN GEO) Path: L:\0546\0058\MXD\EW\Prime Farmland.mxd Date: 1/19/2016 Time: 4:38:54 PM User: KacHD Feet ± Prime farmland if drained Not prime farmland ctive Demolition Landfill pproximate Closed MSW Landfill Boundary Closed Demolition Landfill MSW Combuster sh Landfill Landfill Expansion Options Potential Gravel Mining Location POLK COUNTY JN 2016 Prime Farmland Figure 7

53 Figure 8 Sandberg loamy sand, 1 to 6 percent slopes Hilaire loamy fine sand Pits, gravel-udipsamments complex Sandberg loamy sand, 6 to 12 percent slopes Radium loamy sand Grimstad fine sandy loam Reis-Clearwater complex Clearwater loam Clearwater clay Fram loam Clearwater loam Hedman loam Hedman loam Fram loam Clearwater loam Reis-Clearwater complex Strathcona and Kratka soils, depressional Hilaire loamy fine sand Thiefriver fine sandy loam Clearwater loam Hamre muck Huot fine sandy loam Clearwater clay Legend Soil Series Huot fine sandy loam Polk County Landfill Propery Boundary Syrene Hattie clay, 6 to 18 percent slopes, eroded sandy loam Potential Gravel Mining Location 2012 erial Photograph (Source: MN GEO) Clearwater Path:loam L:\0546\0058\MXD\EW\Soil Survey.mxd 500 Feet Date: 1/19/2016 Time: 4:41:24 PM User: KacHD0606 ± Existing MSW Disposal rea Wyrene sandy loam Landfill Expansion Options Landfill Features Wyrene sandy loam ctive Demolition Landfill pproximate Closed MSW Landfill Boundary Closed Demolition Landfill MSW Combuster sh Landfill POLK COUNTY JN 2016 Soil Series Survey Figure 8

54 Figure 9 HUC-4: Red Lake River HUC-12: Black River HUC-4: Red Lake River HUC-12: Judicial Ditch No 60 HUC-4: Red Lake River HUC-12: Town of Huot-Red Lake River HUC-4: Red Lake River HUC-12: Judicial Ditch No 60 HUC-4: Red Lake River HUC-12: Town of Huot-Red Lake River HUC-4: Red Lake River HUC-12: Cyr Creek HUC-4: Red Lake River HUC-12: Kripple Creek HUC-4: Red Lake River HUC-12: City of Crookston-Red Lake River HUC-4: Red Lake River HUC-12: Gentilly River HUC-4: Red Lake River HUC-12: Gentilly River HUC-4: Red Lake River HUC-12: County Ditch No 15 HUC-4: Red Lake River HUC-12: County Ditch No 15 HUC-4: Red Lake River HUC-12: Gentilly River Legend HUC-4: Red Lake River HUC-12: Middle Burnham 2013 erial Photograph (Source: MN GEO) Creek 10,000 5, ,000 Path: L:\0546\0058\MXD\EW\Watersheds.mxd Date: 1/19/2016 Time: 4:42:36 PM User: KacHD0606 Feet POLK COUNTY Watersheds ± HUC-4: Red Lake River HUC-12: Middle Burnham Creek Polk County Landfill Propery Boundary Watershed Boundary JN 2016 Figure 9

55 Figure 10 K ri p p le ee Cr k na Un d me Ge n U n n a m ed tilly Rive r Legend Polk County Landfill Propery Boundary Landfill Features ctive Demolition Landfill pproximate Closed MSW Landfill Boundary Closed Demolition Landfill 2014 erial Photograph (Source: MN GEO) 2,000 1, ,000 Path: L:\0546\0058\MXD\EW\Wetlands and Protected Waters.mxd Date: 1/19/2016 Time: 5:11:14 PM User: KacHD0606 Feet ± MSW Combuster sh Landfill Landfill Expansion Options 1 Mile Radius 2014 MPC Impaired Streams Trout Stream Streams Public Waters Trout Lakes 2014 MPC Impaired Lakes National Wetland Inventory Public Basins POLK COUNTY JN 2016 Surface Waters Near County Property Figure 10

56 Figure 11 BRULE, NOEL TW-1 BRULE, NOEL BRULE, NOEL TW-2 BRULE, NOEL TW-3 PLNTE, VERNON LNETOT, TOM PERREULT, MER OPFERKEN, DICK MW-G23 REITMEIER & BOLL MW-13 MW-7 BRU, KENNETH D. MW-12 MW-8 MW-10 MW-9 CITY OF CROOKSTON CITY OF CROOKSTON MW-4 MW-5 MW-11 DELNGE, RONLD LINDGREN WELL (USGS L032 REITMEIER, LEROY MW-6 CHRBONE, CHRLES K. CROOKSTON TW-19 WELL D-3 JENSRUD, DON VILVEN, SCOTT WLTER, SCOTT H. CROOKSTON TW-23 CITY OF CROOKSTON REITMEIER, LEROY CITY OF CROOKSTON CITY OF CROOKSTON CROOKSTON CTTLE CO DE LGE, LWRENCE H CROOKSTON TW-27 WINE, RUSSELL CROOKSTON OW-4 CROOKSTON TW-20 PLNTE, KEITH CROOKSTON 4 CITY OF CROOKSTON UBOL, DUNE CITY OF CROOKSTON CROOKSTON 1 CITY OF CROOKSTON CROOKSTON 3 CITY OF CROOKSTON USGS E23 CROOKSTON 2 CROOKSTON CTTLE CO CROOKSTON CTTLE CO CROOKSTON OBSERVTION WELL S-2 THE NTURE CONSERVNCY DELGE, NTHONY CROOKSTON CTTLE CO DE LGE, NTHONY R. CROOKSTON CTTLE CO Legend Polk County Landfill Propery Boundary 1 Mile Radius 2014 erial Photograph (Source: MN GEO) 2,000 1, ,000 Path: L:\0546\0058\MXD\EW\Private Water Supply Wells.mxd Date: 1/19/2016 Time: 4:47:52 PM User: KacHD0606 Feet ± Landfill Features ctive Demolition Landfill pproximate Closed MSW Landfill Boundary CWI - Well Use Closed Demolition Landfill Unknown/Not Listed MSW Combuster sh Landfill Other Landfill Expansion Options Commercial Domestic POLK COUNTY Private Water Supply Wells - One Mile Radius Monitoring Community Supply (Municipal) Public Supply/Non-Community-Transient Test Well JN 2016 Figure 11

57 Figure 12 OLD CROSSING TRETY WYS OLD CROSSING TRETY WYS SWEDES SNOWSLED INN 1 CROOKSTON 4 CROOKSTON CTTLE CO. CROOKSTON 2 CROOKSTON 1 CROOKSTON CTTLE CO CROOKSTON CTTLE CO CROOKSTON 3 CROOKSTON CTTLE CO CROOKSTON CTTLE CO CROOKSTON CTTLE CO Legend 3 Mile Radius Polk County Landfill Propery Boundary Landfill Features ctive Demolition Landfill RILWY CO RILWY CO 2013 erial Photograph (Source: MN GEO) 4,200 2, ,200 Path: L:\0546\0058\MXD\EW\High Capacity Wells.mxd Date: 1/19/2016 Time: 4:49:09 PM User: KacHD0606 Feet ± pproximate Closed MSW Landfill Boundary Closed Demolition Landfill CWI - Well Use CROOKSTON CTTLE CO Commercial Industrial Irrigation Community Supply (Municipal) Public Supply/Non-Community-Transient MSW Combuster sh Landfill Landfill Expansion Options POLK COUNTY JN 2016 High Capacity Wells Figure 12

58 Figure 13 Legend High Capacity Wells Commercial Industrial Irrigation Community Supply (Municipal) Public Supply/Non-Community-Transient 3 Mile Radius Emergency Response rea Wellhead Protection rea DWSM Vulnerability Polk County Landfill Property Boundary $ Groundwater Flow Direction $ Groundwater Flow at Landfill ± Miles Path: L:\0546\0058\MXD\EW\Wellhead Protection rea.mxd Date: 1/21/2016 Time: 3:40:50 PM User: KacHD0606 Sources: Esri, HERE, DeLorme, USGS, Intermap, increment P Corp., NRCN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, MapmyIndia, OpenStreetMap contributors, and the GIS User Community POLK COUNTY JN 2016 Wellhead Protection reas Figure 13

59 Figure 14 Proposed Groundwater Compliance Boundary MW-17 MW-14 MW-13 MW-4 MW-7 MW-12 P-6 P-3 P-2 P-1 MW-15 MW-15d P-4 P-8 P-9 MW-8 MW-9 MW-16 MW-11 MW-101 MW-103 P-12 MW-205S MW-203 MW-205D MW-5 15-Year Projected Waste Footprint MW-10 MW-204 MW-6 MW-202 MW-201 Legend Site Monitoring Wells Proposed Monitoring Well Nest 2014 erial Photograph (Source: MN GEO) Feet Path: L:\0546\ \Proposed EMS and Compliance Boundary.mxd Date: 1/19/2016 Time: 5:04:19 PM User: KacHD0606 ± Groundwater Flow Direction Proposed Expansion 20-Year Projected Waste Footprint Existing MSW Disposal ctive Demolition Landfill Closed Demolition Landfill MSW Combuster sh Proposed Compliance Boundary Polk County Landfill Property Boundary pproximate Closed MSW Landfill Boundary POLK COUNTY Landfill Environmental Monitoring System and Compliance Boundary JN 2016 Figure 14

60 Figure 15 Wetland C Wetland Wetland B Wetland D Legend Landfill Features ctive Demolition Landfill 2014 erial Photograph (Source: MN GEO) Path: L:\0546\0058\MXD\EW\Proposed Landfill Wetlands.mxd Date: 1/19/2016 Time: 5:06:14 PM User: KacHD0606 Feet POLK COUNTY ± pproximate Closed MSW Landfill Boundary Closed Demolition Landfill MSW Combuster sh Landfill Landfill Expansion Options Wetlands within Proposed Landfill Expansion Polk County Landfill Propery Boundary Field Delineated Wetlands National Wetland Inventory Streams Lakes (MN) JN 2016 Figure 15