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Pearson Farm Residential Development EAW Draft—March XX,2017 <br /> require perimeter sediment control maintenance and sediment removal. BMPs to be implemented <br /> during construction include: <br /> 1. Construction of temporary sediment basins in the locations proposed for stormwater <br /> ponding, and development of these basins for permanent use following construction. <br /> 2. Installation of silt fence and other perimeter erosion controls prior to initiation of earthwork <br /> and maintenance of these controls until viable turf or ground cover is established on exposed <br /> areas. <br /> 3. Periodic street cleaning and installation of a rock constriction entrance to reduce tracking of <br /> dirt onto public streets. <br /> 4. Stabilization of exposed soils within the time limits specified in the General NPDES permit. <br /> 5. Energy dissipation,such as riprap,installed at storm sewer outfalls. <br /> 6. Use of cover crops,native seed mixes, sod, and landscaping to stabilize exposed surface <br /> soils after final grading. <br /> Erosion control plans will be reviewed and accepted by the City of Ramsey and the LRRWMO prior <br /> to project construction. Potential adverse effects from construction-related sediment and erosion on <br /> water quality will be minimized by implementation of the above BMPs during and after constriction. <br /> iii. Water Appropriation. Describe if the project proposes to appropriate surface or groundwater <br /> (including dewatering).Describe the source, quantity, duration, use and purpose of the water use <br /> and if a DNR water appropriation permit is required.Describe any well abandonment. If connecting <br /> to an existing municipal water supply, idents the wells to be used as a water source and any effects <br /> on, or required expansion of, municipal water infrastructure. Discuss environmental effects from <br /> water appropriation, including an assessment of the water resources available for appropriation. <br /> Idents any measures to avoid, minimize, or mitigate environmental effects from the water <br /> appropriation. <br /> Surface/Groundwater Appropriations and Dewatering <br /> Project constriction is expected to require dewatering and groundwater appropriation to facilitate <br /> installation of sanitary sewer and excavation of a deep 3-acre pond,but the project will not involve <br /> installation of new water wells. Project development will require a MN DNR water appropriation <br /> permit if dewatering required for installation of utilities exceeds 10,000 gallons/day or 1 million <br /> gallons/year. If constriction dewatering does not exceed 50 million gallons in total and a duration of <br /> one year from the start of pumping,the project proponent will be eligible for coverage under the <br /> amended MN DNR General Permit 1997-0005 for temporary water appropriations. Although the <br /> extent and duration of construction dewatering that may be necessary is currently unknown, <br /> constriction dewatering is expected to be unnecessary or temporary. Groundwater appropriated for <br /> constriction dewatering will be discharged to temporary sediment basins within the project area. It <br /> is not anticipated that constriction dewatering will be extensive or continue long enough to affect <br /> nearby domestic water wells. <br /> 15 <br />