6.9. SR 09-06-2011 - Laserfiche WebLink

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SUMMARY OF MAJOR ISSUES Fish and Wildlife (Item 11) The majority of the site. is in agricultural production and therefore offers limited habitat for wildlife due to crop monocultures and frequent disturbance. There are a few wetlands and wooded areas within the study area that provide some connection to wetlands and wooded areas outside the study area. Information from the DNR Natural Heritage Database identified possible loggerhead shrike (Lanius ludovicianus), astate-listed threatened bird species that prefers dry upland prairie or open grassland with scattered hedgerows, shrubs, and small trees, within aone-mile radius of the study area. With the agricultural areas being planted in grasses and the adjoining trees associated with the windbreaks within the study area, this area could be suitable for loggerhead shrike. To provide mitigation for development, a corridor for wildlife, storm water management, and recreational opportunities will be implemented as part of development in the study area. Additionally, the City will require buffers around wetlands and storm water ponds as part of the development. Water Supply (Item 13) The City's water system is split into two pressure zones, the high pressure zone is located in the north portions of the City and the low pressure zone is located in the south portion of the City. The AUAR study area is located in the low pressure zone. The low pressure zone and high pressure zone are connected by three booster stations. Both the water storage and well supply capacities for the entire City are sufficient for the entire City's water demands and the demands of Scenarios 1 and 2. For Scenario 3, the water demand will require water to come from the high pressure zone at a higher rate on the peak day than Scenarios 1 and 2. There are additional PRV's within the City between the low and high pressure zones. The operation of one or more additional PRV's would provide the necessary flows to meet the Scenario 3 peak day demands. For trunk watermain requirements, watermain will be required to be extended within the study area to provide sufficient fire flow. It is recommended that a 16-inch diameter watermain is extended south from the existing 16-inch diameter watermain within the TH 10 right-of-way at 171 Avenue. The 16-inch diameter watermain should be extended through the west portion of the development ideally within aCity-owned right-of-way. It could then be downsized to a 12-inch diameter on the east side of TH 10 within the 165 Avenue right- of-way. The 12-inch diameter watermain should then be looped within the eastern portion of the development and connected to the existing 16-inch watermain within 171St Avenue. The remaining looping could be accomplished with 8-inch diameter watermain as shown on the attached Figure 13-2 and 13-3. Wastewater/Sanitary Sewer (Item 18) The wastewater generated from the City is diverted to the sanitary sewer collection system and directed to the City's Wastewater Treatment Facility (WW'fF) located between TH () 169 and the Burlington Northern Rail Line, north of the Great River Energy plant. Treated wastewater from Elk River's WWTF is discharged to the Mississippi River. The WWTF has a current average day treatment capacity of 2.2 Million Gallons per Day (MGD). Based on City of Elk River Draft Alternative Urban Areawide Review August 2011 Rage S of 90