10.a1 Groundwater Elevations - All Wells (2-9-22)U:\5028SCA01_Scandia Tiller Manning\Hydrogeo\Groundwater Elevations - All Wells (2-9-22).xlsxGW Elev All Wells1015202530354045910912914916918920922924Annual Precipitation (inches)Elevation (ft amsl)DateGROUNDWATER AND POND ELEVATIONS WITH ANNUAL PRECIPITATION VS. TIME5/2008 - 10/20/2021TILLER (MARTIN MARIETTA) MINESCANDIA, MINNESOTAPZ-4PZ-5MW-1MW-2 (aband. June 2011)PZ-6Prod WellPZ-3PondAnnual PrecipitationNote: Annual precipiation from National Weather Services Mnneapolis‐St. Paul Area
U:\5028SCA01_Scandia Tiller Manning\Hydrogeo\Groundwater Elevations - All Wells (2-9-22).xlsxGW EL All Wells Threshold860870880890900910920930Elevation (ft amsl)DateGROUNDWATERAND EXCAVATION THRESHOLD5/2008 - 10/21/2021TILLER MINESCANDIA, MINNESOTAPZ-4PZ-5MW-1MW-2 (aband. June 2011)PZ-6Prod WellPZ-3Pond50 FeetExcavation depth cannot be greater than 50 ft below the lowest watertable elevation (915.87 ft amsl) measured in PZ‐4 in 2008, which isthe baseline established in the groundwater protection plan. Thisthreshold elevation was calculated at 865.87 ft amsl based on theOctober 30, 2008 PZ‐4 water level measurement.865.87 feet amsl