Agenda - Council - 07/28/2015 - Laserfiche WebLink

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Projected water use The following should be addressed as water plans are updated: • Potential for water use conflicts and well interference - Due to the pervasiveness of private wells in the metro area, there exists a potential water use conflict and well interference of all appropriators • Potential for significant decline in aquifer water levels - Regional groundwater modeling indicates significant aquifer decline under pumping rates that meet the projected range of 2040 demand • Potential for impacts of groundwater pumping on surface water features and ecosystems - A state -designated trout stream is located within 5 miles of the community - Surface waters in the community may be directly connected to regional groundwater system - A spring has been mapped in or nearby the community • Significant vulnerability to contamination - A sinkhole (karst) has been mapped in or nearby the community - A vulnerable Drinking Water Supply Management Area has been designated within the community - A Special Well and Boring Construction Area has been designated within the community - Travel time from land surface to bedrock aquifers is estimated to be less than 50 years • Significant uncertainty about aquifer productivity and extent - Parts of the community may not be represented by a Minnesota Department of Health aqui- fer test - The county geologic atlas is more than twenty years old - Parts of the community may not be represented by a Minnesota Department of Natural Re- sources observation well • Regulatory considerations - A Groundwater Management Area has been designated within the community The Metropolitan Council's Local Planning Handbook contains interactive maps of all of these issues, and they are also summarized in Chapter 5 of this Master Water Supply Plan. The following actions are recommended: WATER SUPPLY PROFILES WATER SUPPLY MASTER PLAN- Draft June 2015 2020 2030 2040 Population Served 37,500 43,200 49,300 Total Population 37,500 43,200 49,300 Projected Average Daily Water Use (Million Gal/Day) 4.1 4.8 5.4 Total Per Capita Water Use (Gal/Person/Day) 109.33 111.11 109.53 Total Per Capita Water Use, Assuming Total Water Use Remains at 2011 Levels 115 100 88 The following should be addressed as water plans are updated: • Potential for water use conflicts and well interference - Due to the pervasiveness of private wells in the metro area, there exists a potential water use conflict and well interference of all appropriators • Potential for significant decline in aquifer water levels - Regional groundwater modeling indicates significant aquifer decline under pumping rates that meet the projected range of 2040 demand • Potential for impacts of groundwater pumping on surface water features and ecosystems - A state -designated trout stream is located within 5 miles of the community - Surface waters in the community may be directly connected to regional groundwater system - A spring has been mapped in or nearby the community • Significant vulnerability to contamination - A sinkhole (karst) has been mapped in or nearby the community - A vulnerable Drinking Water Supply Management Area has been designated within the community - A Special Well and Boring Construction Area has been designated within the community - Travel time from land surface to bedrock aquifers is estimated to be less than 50 years • Significant uncertainty about aquifer productivity and extent - Parts of the community may not be represented by a Minnesota Department of Health aqui- fer test - The county geologic atlas is more than twenty years old - Parts of the community may not be represented by a Minnesota Department of Natural Re- sources observation well • Regulatory considerations - A Groundwater Management Area has been designated within the community The Metropolitan Council's Local Planning Handbook contains interactive maps of all of these issues, and they are also summarized in Chapter 5 of this Master Water Supply Plan. The following actions are recommended: WATER SUPPLY PROFILES WATER SUPPLY MASTER PLAN- Draft June 2015