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~~ <br />Mobile Premix, Inc. Howe Pit Section 9 T2S-R67W <br />1590 W. 12th Ave. M-78-052 <br />Denver, CO 80204 629.3 acres <br />- Reservoir B complete, OSE inspected & approved liner for leakage criteria on 5/l7/2000 <br />- Reservoir A area now under excavation, approx. 66 acres @ 25' deep, dewatering & dry mining <br />- natural groundwater elevation estimated at 5-6' below ground surface <br />-disturbance also consists of 27.5 acre wash pond w/ alluvial groundwater from pit dewatering <br />- latest input from OSE ... needs well permit, TSSP <br />Nyholt Pit Section 34 T1S-R67W <br />M-82-147 <br />308.7 acres <br />- one reservoir complete, mined to shale bedrock & walls lined, not yet inspected by OSE for <br />leakage criteria test, approximately 50 acres in size @ 25 deep <br />- second reservoir partially mined @ 25' depth & partially reclaimed, not ye[ inspected by OSE <br />for leakage criteria test, approximately 94 acres in size, dewatering & dry mining methods <br />- natural groundwater elevation estimated at 5-6' below ground surface <br />- disturbance includes an outlet trench to S. Platte River w/ groundwater, approx. 3' x 3' x 900' <br />- disturbance includes a 2.5 acre wash pond w/ groundwater from dewatering operations <br />- disturbance includes a 3.5 acre tailings impoundment w/exposed groundwater approximately <br />12' deep & 13' below ground surface <br />latest input from OSE ... needs well permit &TSSP <br />Suburban Sand & Gravel Co. Road Runners Rest Section 3 T2S-R67W <br />5400 Fenton Street Nf-79-195 <br />Arvada, CO 80002 175.8 acres <br />- 1 cell completely mined, unlined & partially filled w/ groundwater, approximately 60 acres in <br />stze x 7' of excosed groundwater, water surace approximately 24' below ground surface, <br />natural groundwater elevation expected to be within 10' of ground surface <br />- 2nd cell currently dewatered and dry mined, approximately 90 acres @ l ~-45' deep <br />- current disturbance includes a large ? 10-acre? wash pond w/ groundwater from pit dewatering <br />- latest OSE input ... needs well permit &TSSP <br />