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Adelaide Landing Residential Development EAW, Hugo January 31, 2017 The wells range in depth from 201 to 355 feet deep, and draw water from the Prairie Du Chien/Jordan aquifer and the Franconia -Ironton -Galesville formation (2008 LWRMP). The city's DNR water appropriations permit allows a total system pumping capacity of 650 million gallons per year (MGY). Three of the six wells (bolded table 11.2) are located within one mile of the property and combined allow for a pumping capacity of 1,300 MGY. According to DNR Water Appropriation records as of 2015, the city reported pumping 102 MGY (average 0.28 million gallons per day) from these three wells. The estimated average water demand for the proposed development is 35.6 MGY (97,654 GPD) based on the assumption that consumption is approximately 110 percent of wastewater generation (see Item 11). The summertime peak factor in the city of Hugo over the past 10 years has averaged 3.53. Consequently, the peak flow is estimated at (97,654 X 3.53 = 344,719 GPD). No water supply issues are anticipated as a result of adding the development to the city's water supply system. Water will be supplied to the development via the Hugo municipal water supply system. According to Hugo's Comprehensive Water Supply and Distribution Plan, future development in the area will be supplied by a 12-inch watermain. The project will join with the existing 12-inch watermain on 130t1i Street N, which connects to a water tower on Falcon Avenue N. A 1.5 million gallon water tower is also noted in the comprehensive plan to the south of the project area. A fire flow analysis will be completed if deemed necessary by City Engineering staff and the watermain piping will be sized accordingly. 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. The project will involve minor physical alterations of wetlands within the subject property. Unavoidable wetland impacts are anticipated to be limited to approximately 1.50 to 2.20 acres of fill, and are primarily associated with 3 locations necessary to allow for safe ingress and egress on the project. Otherwise, housing, ponding, and open space have been placed in a manner that substantially avoids impacts to water resources. Water resources within the project area will be regulated under: • The Minnesota Wetland Conservation Act of 1991, as amended, administered in this area by the City of Hugo, and • The RCWD Rules: Floodplain Alteration, Wetland Alteration, Erosion and Sediment Control Plans, Stormwater Management Plans, and Drainage Systems. 22