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Trott Brook Crossing EAW August 2021 <br /> Impaired waters (including their DNR Public Water Inventory Number)within one mile of the project are <br /> listed below in Table 6. <br /> Table 6.Impaired Waters <br /> Name DNR ID AVID Reach Impairment Approved TMDL(s) <br /> Type(s) <br /> TMDL approved for: Dissolved <br /> Trott CD 51 to AQL(Aquatic oxygen <br /> Brook M-063-001.5 07010207-680 Rum R Life) TMDL not required for: None <br /> Additional impairments: <br /> FishesBio; InvertBio <br /> Impaired waters listed by the Minnesota Pollution Control Agency(MPCA) and located within 1 <br /> mile of the site include Trott Brook(AUID 07010207-680),which is impaired for aquatic life <br /> (AQL). Because Trott Brook is an impaired receiving water within 1 mile of the project,additional <br /> BMPs are required for water quality protection,including: <br /> 1. complete stabilization of exposed soil within seven calendar days after construction activity <br /> in respective parts the project temporarily or permanently ceases; <br /> 2. temporary sediment basin(s) for common drainage areas covering five or more acres of area <br /> disturbed at one time; and <br /> 3. mandatory Stormwater Pollution Prevention Plan(SWPPP)review because the project will <br /> disturb more than 50 acres land. <br /> The SWPPP must be submitted to the MPCA at least 30 days prior to the construction start date. <br /> The project area does not include any trout streams/lakes,wildlife lakes,migratory waterfowl <br /> feeding/resting lake, or outstanding resource value waters. <br /> ii. Groundwater—aquifers, springs, seeps. Include: 1) depth to groundwater; 2) ifproject is within <br /> a MDH wellhead protection area; 3) identification of any on-site and/or nearby wells, including <br /> unique numbers and well logs if available. If there are no wells known on site or nearby, explain <br /> the methodology used to determine this. <br /> Groundwater discharge was observed at several springs within the northern portion of Wetland 5 <br /> (Figure 6). Depth to groundwater varies across upland portion of the project area from 7.5 feet to <br /> deeper than 21 feet below the soil surface based upon geotechnical borings and piezometer readings. <br /> Haugo GeoTechnical Services (HGTS)performed geotechnical soil borings on the site on July 21, <br /> 2021. Groundwater elevations observed during geotechnical borings are shown on the following <br /> page in Table 7. A field map and boring logs provided by HGTS are included in Appendix C. <br /> 12 <br />