Laserfiche WebLink
of ~o~o. <br />~~ <br />y~-.- 9p, DEPARTMENTOF NATURAL RESOURCES <br />• ;,, (•rl`~~ *' David H. Getches, Eaecuhve Dhector <br />`' ~~,~~~°J" ~ MINED LAND RECLAMATION DIVISION <br />• r876 ` DAVID C. SHELTON, Director <br />Richard D. Lamm <br />Governor ~r~~ <br />April 10, 1986 <br />Mr. Ed Moyer <br />Geologist/Reclamation Specialist <br />Colowyo Coal Company <br />5731 State Highway 13 <br />P!eeker, Colorado 81641 <br />iii iiuiiiiniu iii <br />Re: C-81-019, Streeter Fill Monitoring 4lells at the 6900 Elevation <br />Dear Mr. Moyer: <br />The Division agrees with Colowyo's proposal to reinstate a well at the 6900 <br />elevation to monitor the perched water table in the Streeter Fill. I agree <br />that competence of the well casing to be installed is of primary importance, <br />therefore, alternate casing materia] (other than PVC) should be used. Colowyo <br />should obtain spec's for pipe that will allow some qualification of metals <br />that would be elevated due to contact of ground water with the casing. As we <br />discussed, a permanently installed pump, allowing proper well evacuation, <br />should minimize this problem. <br />Concerning the two collapsed wells, the Division requests that you supply <br />information as to the depth of the sheared zone in each well. Also, during <br />drilling for installation of the new well, this zone or zones should be <br />closely logged, with special note of problems such as toss of circulation or <br />other variations such as drilling or penetration rate. <br />I will be pleased to discussed any of these issues with you if you want <br />clarifications. <br /> <br />Candace M. Thompson <br />Hydrologist <br />CMT/pjh <br />9173E <br /> <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />