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GROUNDWATER OBSERVATION DATA WATTENBERG LAKES <br />Aggregate Industries <br />WELL NUMBER MW -9 40 Degrees 00.91 North <br />104 Degrees 50.40 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 />3.80 <br />4939.62 <br />4938.59 <br />4935.82 <br />2.77 <br />(0.67) <br />Not dewatering. <br />02/20/13 <br />4.40 <br />4939.62 <br />4938.59 <br />4935.22 <br />3.37 <br />(0.77) <br />Mud @ 4.4. <br />Mud @ 4.4. Slurry wall construction commenced <br />in March, w /water being pumped from existing <br />excavated pond (starting March 13) to betonite <br />slurry pond. Construction commenced @ Station <br />60 on E side just S of conveyor bridge /exisiting <br />excavation & continued to N boundary, then W <br />03/25/13 <br />4.40 <br />4939.62 <br />4938.59 <br />4935.22 <br />3.37 <br />10 27) <br />toward W boundary. <br />Mud @ 4.4 Slurry wall continued across N <br />boundary then S along W boundary to Station <br />17 +50 as of 4/29/13. Water being pumped from <br />04/19113 <br />4.40 <br />4939.62 <br />4938.59 <br />4935.22 <br />3.37 <br />(0.77) <br />existing excavated pond 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 <br />5/30/13. Water being pumped from existing <br />05/22/13 <br />4.30 <br />4939.62 <br />4938.59 <br />4935.32 <br />3.27 <br />(1 17) <br />excavated pond 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 <br />6/17/13 (slurry wall completion date). Water being <br />pumped from existing excavated pond to betonite <br />slurry pond through 6/13/13. Pit dewatering from <br />06/26/13 <br />4.00 <br />4939.62 <br />4938.59 <br />4935.62 <br />2.97 <br />(1.37) <br />within slurry lined pit commenced 5/24/13. <br />07/24/13 <br />3.80 <br />4939.62 <br />4938.59 <br />4935.82 <br />2.77 <br />(1.17) <br />Pit dewatering from within slurry lined pit. <br />08/20/13 <br />3.70 <br />4939.62 <br />4938.59 <br />4935.92 <br />2.67 <br />(1.07) <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 />4939.62 <br />4938.59 <br />#VALUE1 <br />dewatering from within slurry lined pit. <br />E slurry wall breach repaired week of Oct. 14. Pit <br />10/22/13 <br />2.50 <br />4939.62 <br />4938.59 <br />4937.12 <br />1.47 <br />(0.37) <br />dewatering from within slurry lined pit. <br />11/20/13 <br />2.70 <br />4939.62 <br />4938.59 <br />4936.92 <br />1.67 <br />(0.57) <br />Pit dewatering from within slurry lined pit. <br />N slurry wall breach repaired week of Dec. 16. Pit <br />12/09/13 <br />2.80 <br />4939.62 <br />4938.59 <br />4936.82 <br />1.77 <br />(0.17) <br />dewatering from within slurry lined pit. <br />Page 1 of 1 <br />