6.2.- 6.4. SR 11-18-2002 - Laserfiche WebLink

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Elk River Station EAW September 6, 2002 According to the Well Location Points digital database from the Minnesota Geological Survey's (MGS) County Well Index, there is one non field-verified registered well within the project site (Exhibit 7). The data consists of a Geographic Information System (GIS) point coverage that was created from wells listed in the County Well Index (CWI) database, and are current as of December 28, 1998. According to the CWI database, this well (unique well number 159959) is an active, domestic well, is 59 feet deep, and is registered under the name of Quintin. Lanner. This well location has not been confirmed in the field. However, active wells on the property will be field-located, abandoned, and sealed in accordance with Minnesota Department of Health regulations. The proposed development will be connected to the City of Elk River municipal water supply system for domestic use and fire protection. The City has planned for an adequate municipal water supply system to supply the proposed and future developments. A trunk watermain exists in Tyler Street and will be looped through the site provide water service to the development. The project, will not require installation of any new domestic wells. The Elk River municipal water supply is authorized to pump up to 600 million gallons per year (mgy) under DNR Water Appropriation permit number 75- 3215. The Elk River municipal water supply currently includes six wells, which have the capacity to pump 5.5 mgy. The quantity of water used by the residents of Elk River Station is expected to be proportional to the amount of sanitary wastewater produced (Item 18a). The estimated water demand for Elk River Station is 139,850 gallons per day. Water demand estimates are based on the assumption that consumption is approximately 110 percent of wastewater generation. Although it is possible that a DNR Water Appropriation Permit may be necessary to conduct construction dewatering, it is unlikely that dewatering will be necessary during construction because the depth to groundwater exceeds the planned depth of sanitary sewer, municipal water, and storm sewer in most areas within the project site. If groundwater is encountered, contractors will carry out dewatering on a case-by-case basis at the minimum duration and quantity necessary to construct utility service for the affected sites. The quantity and duration of potential construction dewatering is not known at this time, but it is expected that any necessary dewatering will be temporary. Groundwater appropriated for construction dewatering purposes will be discharged to temporary or permanent stormwater ponds located within the project site before discharging the wetland. If construction dewatering and pumping from the proposed development exceeds the 10,000-gallon per day or 1,000,000 gallons per year thresholds, a DNR Water Appropriation Permit will be obtained. If it becomes apparent that construction dewatering will not exceed 50 million gallons in total, and_ duration of one year from the start of pumping, the contractor or project proposer will apply to the DNR Division of Waters for coverage under the amended DNR General Permit 97-0005 for Temporary Water Appropriations. It is not anticipated that construction dewatering or pumping from the proposed development will be extensive or continue long enough to impact domestic or municipal wells. 14. Water-Related Land Use Management District Does any part of the project involve a shoreland zoning district, a delineated 100-yearfloodplain, or a state or federally designated wild or scenic river land use district? [] Yes [] No If yes, identify the district and discuss project compatibility with district land use restrictions. The project does not involve a delineated 100-year floodplain or a state or federally designated wild or scenic river land use district. The hydrology of the area will be studied and lowest floors will be set at elevations that will not be subject to localized flooding. DNR protected waters, wetlands, and watercourses do not exist on the site, The nearest DNR protected wetland is Kleiver Marsh (72-3W), which is located approximately 1,800 feet northeast of the project site. The project is not located within 1,000 feet of Kleiver Marsh, and is therefore not within the shoreland overlay district. Page 8 ~¥ Westwood Professional Services, Inc.