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Identification of Water Supply Alternatives for Elk River <br />Table of Contents <br />1.0 Introduc[ion .............................................................................................................. ..............................1 <br />1.1 Scope and Purpose ........................................................................................ .............................. 1 <br />1.2 Report Organization ...................................................................................... .............................. l <br />1.3 Other Relevant Studies and Initiatives .......................................................... ..............................2 <br />1.4 Regional Water Demand and Use ................................................................. ..............................2 <br />2.0 Groun dwater Supplies ............................................................................................... ..............................4 <br />2.1 Regional Geologic Setting ............................................................................ ........................:.....4 <br />2.2 Geologic Conditions in the Elk River Area .................................................. ..............................7 <br />2.3 Regional Aquifer Sys[ems ............................................................................ ............................10 <br />2.4 Regional Groundwater Contatination and Water Quality ........................... ............................15 <br />2.5 Available Aquifers in the Elk River Area ..................................................... ............................16 <br />2.6 Regional Groundwater Use ........................................................................... ............................19 <br />2.7 Groundwater Use in the Elk River Area ....................................................... ............................ 20 <br />3.0 Surface-Water Supplies ......................................................................................... ...............................25 <br />3.1 Regional Surface Water Supplies .............................................................. ...............................25 <br />3.2 Regional Surface-Water Reliabili[y ........................................................... ...............................25 <br /> 3.2.1 Water Treatment and Contamination ............................................ ............................... 26 <br /> 3.2.2 Low-Flows and Drought ............................................................... ............................... 26 <br />4.0 Summary of Alternative Water Supply Options .................................................... ...............................28 <br />4.1 Continued Use of Mt. Simon-Hinckley Wells ........................................... ...............................28 <br /> 4.1.1 Description .................................................................................... ...............................28 <br /> 4.1.2 Technical Feasibility and Reliability ............................................ ............................... 28 <br /> 4.1.3 Cost ............................................................................................... ...............................28 <br /> 4.1.4 Challenges and Other Considerations ........................................... ............................... 28 <br />4.2 New Wells in the Surficial (Unconsolidated) Aquifer ............................... ...............................29 <br /> 4.2.1 Description .................................................................................... ...............................29 <br /> 4.2.2 Technical Feasibility and Reliability ............................................ ............................... 29 <br /> 4.2.3 Cost ............................................................................................... ...............................29 <br /> 4.2.4 Challenges and Other Considerations ........................................... ............................... 29 <br />4.3 A uifer Stora a and Recover ASR <br />9 g Y ~ ) ....................................................... ........................30 <br />....... <br /> 4.3.1 Description .................................................................................... ...............................30 <br /> 4.3.2 Technical Feasibility and Reliabilily ............................................ ............................... 30 <br /> 4.3.3 Cost ............................................................................................... ...............................30 <br /> 4.3.4 Challenges and Other Considerations ........................................... ............................... 30 <br />4.4 Artificial Rechazge by Infiltration Basins .................................................. ...............................31 <br />P:\Mpls\23 MN\7t\2371105 Water Supply Alternative Stady\FiualDeliverables\Alternatives_Report_final.doc i <br />