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wsb Final Technical Memorandum To: Michael Grochala, City of Lino Lakes From: Jon Christensen, WSB Date: June 12, 2025 Re: Water Appropriations— 1-35E Corridor AUAR City of Lino Lakes, Minnesota WSB Project No. 027919-000 INTRODUCTION The original Alternative Urban Areawide Review (AUAR)was completed and approved in September 2005. The AUAR analyzed the water appropriation impacts of the two development scenarios. Based on the analysis, a Mitigation Plan was developed. 0 0 6 AUAR updates are required every five years from the original date of the approved AUAR. w Updates were prepared in 2010, 2015, and 2020. Each assumed no change in the proposed co development land use scenarios and included discussion of mitigation improvements that had been completed at the time. Since the 2020 update, the City has adopted its 2040 Comprehensive Plan. This AUAR Update reviews two scenarios. co The information and analysis outlined within this memo is intended to complete a portion of the M 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 z 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 0 the water use and if a DNR water appropriation permit is required. Describe any well a abandonment. If connecting to an existing municipal water supply, identify the wells to be used as W Z 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 o environmental effects from the water appropriation. w 7) Existing Conditions U) The Minnesota Hydrogeology Atlas indicates that the depth to water table within the study area U) varies from open water to 20 feet deep. Temporary water appropriation for construction D dewatering under DNR General Permit 1997-0005 will likely be required for the construction of w building foundations and buried utilities. a a 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. It is possible that additional pre-code unlocated wells exist within the study area. Developers are responsible for locating and sealing any unlocated wells prior to development. Private well MA027919-000Wdmin\Docs\Water Wastewater\MEMO Water 2025-06-02.docx Page 82 of 240 z