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ORIGINAL -PUBLIC FILE <br />(Page 2) <br />MINE ID # OR PROSPECTING ID #: nn_~nna-Q,41 <br />INSPECTION DATE: 7_/~rnd INSPECTORCS INITIALS: ~- <br />OBSERVATIONS <br />Th~° Division conducted a PRE-OPERATIONAL inspection of the site on 7/7/04. <br />Th> site is being proposed to be 112 sand and gravel operation covering 204 <br />acres. The operator plans to utilize slurry walls to conduct the operation. <br />Site is located approximately 3~ mile west of Commerce City, in Adams <br />County. The post mining land use is going to be a water reservoir for the <br />City Of Thornton. <br />Permit application sign was properly posted along the East Side of the <br />permit boundary. Operator's representatives explained in detail the <br />proposed mining plan. They stated that prior to any mining activity, the <br />slurry wall design will be submitted to the State Engineers Office and <br />approval obtained and post the required 20% warranty for the slurry with <br />the Division (DMG). They also agreed to all the ground water and <br />geotechnical MONITORING conditions that their consultant placed in the <br />permit application, which will be placed as part of the Division's decision <br />approval. Operator had submitted in the application-recorded wells with in <br />600 and 1500 feet of the permit area. <br />They also stated during the inspection, they would not object to the <br />Division placing a condition to mitigate any wells if affected by the <br />operation that are with in 600 feet of the permit area. They also agreed to <br />provide a model showing that there will be no impact to the lower aquifer <br />dine to the dewatering operations. The entire permit area was driven and <br />iraspected, the site is as described in the permit application. <br />18. E Contact Address <br />NAME: Ms. PAM HORA <br />OPERATOR: TETRA TECH RMC <br />STREET: 1900 SSIINSFT STRFFT,.SIIITF 1-F <br />CITY/STATE/ZIP: I (~NGMI~NT, Cn RO501 <br />CC: <br />Harry Posey (e-mail) <br />cc: r CE <br />r BL <br />r FS <br />r HW <br />r HMWMD (CH) <br />r <br />r SE <br />r WQCD (CH) <br />r OTHER <br />