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0 U C0 Z W m U) z U) J 0 a a W Z Z 0 0 w U) T W Z W Q Q Z w x 0 ws b Final Technical Memorandum To: Michael Grochala, City of Lino Lakes From: Jon Christensen, WSB Andi Moffatt, WSB Date: April 8, 2020 Re: Water Appropriations — 1-35 Corridor AUAR City of Lino Lakes, Minnesota WSB Project No. R-015144-000 INTRODUCTION The original Alternative Urban Areawide Review (AUAR) was completed and approved in September 2005. The AUAR analyzed the stormwater impacts of the three development scenarios. Based on the analysis, a Mitigation Plan was developed. AUAR updates are required every five years from the original date of the approved AUAR. Updates were prepared in 2010 and 2015. Each assumed no change in the proposed development land use scenarios and included discussion of mitigation improvements that had been completed at the time. Since the 2015 AUAR update was prepared, the City has completed an updated Comprehensive Plan. This AUAR Update includes review of three scenarios. The information and analysis outlined within this memo is intended to complete a portion of the AUAR Update related to Item # 11.b.iii — Water Resources — Water Appropriation related to revising of the three scenarios. This memo is intended to update the water analysis provided in the original AUAR where applicable. WATER RESOURCES — WATER APPROPRIATIONS 11.b.iii - Water appropriation - Describe if the project proposes to appropriate surface or groundwater (including dewatering). Describe the source, quantity, duration, use and purpose of the water use and if a DNR water appropriation permit is required. Describe any well abandonment. If connecting to an existing municipal water supply, identify the wells to be used as a water source and any effects on, or required expansion of municipal water infrastructure. Discuss environmental effects from water appropriation, including an assessment of the water resources available for appropriation. Identify any measures to avoid, minimize, or mitigate environmental effects from the water appropriation. Existing Conditions Currently, the majority of the study area is served by private wells. The Minnesota Well Index indicates there are approximately 90 wells within the study area which are nearly all for domestic use. No information is available regarding these private wells beyond the Minnesota Well Index. The municipal water supply system has a DNR water appropriation permit. The water distribution system exists in the southern portion of the study area and currently extends north of Main Street on either side of 1-35E. The system will continue to be extended as development progresses. KA015144-000\Admin\DOCSWUAR -Update 2020\Water Wastewater\MEMO - 040820-Water.docx