2015-02-11 CC Packet - Laserfiche WebLink

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Draft North & East Metro Groundwater Management Area Plan 5-2 ii. DNR will evaluate the benefits of evaporation monitoring networks on lakes in the GWMA. iii. DNR will summarize the available climatological data related to groundwater management for the new GWMA reporting system b. DNR will continue to improve information on water use within the GWMA. i. Refine estimates of groundwater use that does not require a permit. Note: permits are not required for uses that are less than 10,000 gallons per day or 1 million gallons per year or other domestic supplies that serve 25 or fewer people. c. DNR will develop and use standard groundwater models and methods to predict volumes, rates and water level impacts from groundwater appropriations. i. DNR supports the ongoing work of the USGS and the Metropolitan Council to update, locally refine, and apply the Metro Model 3 to improve understanding of the effects of groundwater appropriations on the levels of White Bear Lake and other lakes in the GWMA. d. Develop additional information on groundwater associated biological communities to inform permit decisions. i. A GIS-based model will be developed to map potential Wet Prairie Complexes on the Anoka Sandplain. ii. Field surveys will be conducted to refine the model described above in "I.d.i", and to document additional locations of native plant communities and populations of state- listed rare plant and animal species in the GWMA. e. DNR will create a new GWMA reporting system, to make the results of data collection and analysis in the GWMA available to the public. 2. DNR will develop and apply sustainability thresholds for aquifers,ecosystems and surface waters in the GWMA18. a. DNR will use safe yield for aquifers to determine limits to appropriation permits in the GWMA.19 b. DNR will use a maximum of 15%of a stream's specified low flow as the maximum rate of withdrawal with no material increase in temperature (for trout streams) in determining a negative impact as required by Minnesota Statutes,sec. 103G.287,subd. 2. 18 Sustainability means that groundwater and surface water levels,water quality,and ecosystems are not harmed and that present and future generations will be able to meet their need for water. 19 Safe yield for artesian conditions means the amount of groundwater that can be withdrawn without degrading water quality or causing a continual decline in groundwater levels that results in a change from artesian to water table condition.Safe yield for water table conditions means the amount of water that can be withdrawn without degrading the quality of the water in the aquifer and without allowing the long term average withdrawal to exceed the available long term average recharge to the aquifer system based on representative climatic conditions. 81