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GROUNDWATER OBSERVATION DATA WATTENBERG LAKES <br />Aggregate Industries <br />WELL NUMBER MW -2 40 Degrees 01.32 North <br />104 Degrees 50.16 West <br />Date <br />Depth Measured <br />PVC Rim <br />Ground <br />Water <br />Depth Below <br />Difference from <br />Notes <br />Time <br />(PVC rim to water) <br />Elevation <br />Elevation <br />Elevation <br />Original Ground <br />Historic Levels <br />(ft) <br />(ft) <br />(ft) <br />(ft) <br />(ft) <br />(ft) <br />01/16/13 <br />5.60 <br />4936.40 <br />4933.77 <br />4930.80 <br />2.96 <br />(0.90) <br />Not dewatering. <br />Total well depth - 14.6 (measured per B <br />Schenderlein question re changing trend in well <br />02/20/13 <br />5.40 <br />4936.40 <br />4933.77 <br />4931.00 <br />2.76 <br />(0.40) <br />measures & possible well failure) <br />Slurry wall construction commenced in March, <br />w /water being pumped from existing excavated pond <br />(starting March 13) to betonite slurry pond. <br />Construction commenced @ Station 60 on E side <br />just S of conveyor bridge /exisiting excavation & <br />continued to N boundary, then W toward W <br />03/25/13 <br />5.30 <br />4936.40 <br />4933.77 <br />4931.10 <br />2.66 <br />(0.30) <br />boundary. <br />Slurry wall continued across N boundary then S <br />along W boundary to Station 17 +50 as of 4/29/13. <br />Water being pumped from existing excavated pond <br />04/19/13 <br />5.10 <br />4936.40 <br />4933.77 <br />4931.30 <br />2.46 <br />(0.10) <br />to betonite slurry pond. <br />Slurry wall continued S along W boundary then E <br />along S boundary to Station 96 +97.86 as of 5/30/13. <br />Water being pumped from existing excavated pond <br />05/22/13 <br />5.40 <br />4936.40 <br />4933.77 <br />4931.00 <br />2.76 <br />(0.90) <br />to betonite slurry pond. <br />Slurry wall continued E along S boundary then N <br />along E boundary to Station 59 +64.73 as of 6/17/13 <br />(slurry wall completion date). Water being pumped <br />from existing excavated pond to betonite slurry pond <br />through 6/13/13. Pit dewatering from within slurry <br />06/26/13 <br />5.66 <br />4936.40 <br />4933.77 <br />4930.74 <br />3.02 <br />(1.66) <br />lined pit commenced 5/24/13. <br />07/24/13 <br />5.00 <br />4936.40 <br />4933.77 <br />4931.40 <br />2.36 <br />(1.00) <br />Pit dewatering from within slurry lined pit. <br />08/20/13 <br />5.10 <br />4936.40 <br />4933.77 <br />4931.30 <br />2.46 <br />(0.60) <br />Pit dewatering from within slurry lined pit. <br />S Platte flooded site; slurry wall breached in 1 area <br />on E boundary & 1 area on N boundary. Pit <br />09/12/13 <br />4936.40 <br />4933.77 <br />#VALUE! <br />dewatering from within slurry lined pit. <br />E slurry wall breach repaired week of Oct. 14. Pit <br />10/22/13 <br />3.40 <br />4936.40 <br />4933.77 <br />4933.00 <br />0.76 <br />(0.40) <br />dewatering from within slurry lined pit. <br />11/20/13 <br />3.80 <br />4936.40 <br />4933.77 <br />4932.60 <br />1.16 <br />(0.80) <br />Pit dewatering from within slurry lined pit. <br />N slurry wall breach repaired week of Dec. 16. Pit <br />12/09/13 <br />4.40 <br />4936.40 <br />4933.77 <br />4932.00 <br />Rap 1 of <br />(0.40) <br />dewatering from within slurry lined pit. <br />