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GENERAL36513
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Last modified
8/24/2016 7:57:02 PM
Creation date
11/23/2007 8:46:01 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
General Documents
Doc Date
7/12/1995
Doc Name
BASELINE HYDROLOGY & OVERBURDEN ASSESSMENT
From
DMG
To
COLOWYO COAL CO LP
Permit Index Doc Type
GENERAL CORRESPONDENCE
Media Type
D
Archive
No
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/`` <br /> <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />1311 Sherman St.. Room 215 <br />Denver, Colorado 80203 <br />Phone: 13031 866-7567 <br />FA%: 1307) 872-8106 <br />July 12, 1995 <br />Mr. A. Dale Thompson <br />Land Supervisor <br />Colowyo Coal Company LP. <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />RE: Baseline Hydrology and Overburden Assessment <br />bear Mr. Thompson: <br />I~~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5. Lochhead <br />Executive Dueaor <br />Michael B. LnnF <br />Division Director <br />I received your letter dated June 22, 1995 with a brief outline of the baseline hydrology <br />sampling plans we discussed during a meeting at the Colowyo Mine last month. The general <br />plan to locate updip and downdip monitoring wells in the Trout Creek Sandstone and G <br />coal seam, as well as alluvial wells above and below the anticipated mine area should be <br />adequate for collecting baseline data required by the coal regulations. I would suggest <br />quarterly monitoring of groundwater levels and, at least an annual full-suite chemical <br />analysis at each of the monitoring points. <br />I do not recall discussing specifics of the surface water monitoring plan, other than location <br />and frequency of monitoring. The sampling network outlined in your letter should be <br />adequate. I would suggest installation of continuous recorders or high flow recorders to <br />obtain accurate flow data. Full suite analyses at high and low flow seasons, and partial or <br />field pazameter measurements during other sampling should give a characteristic <br />representation of stream water quality. If you have questions about parameters or lab <br />methodologies for full and partial analyses, let me know. <br />I also promised to give you recommendations in regard to the Division's suggested <br />overburden assessment methodologies. In the absence of a current guidance or policy <br />document of its own, the Division has recommended that potential applicants refer to soil <br />and overburden documents from neighboring Rocky Mountain states. Montana, Wyoming, <br />and Utah counterparts of the DMG have very similar recommendations and unsuitability <br />criterion which the Division staff generally concur with. I have enclosed a relevant portion <br />of the Montana State Department of Lands' 1994 "Soil, Overburden and Regraded Spoil <br />Guidelines' for your reference. <br />III ~II~II~II~~II III <br />sss <br />STATE OF COLORADO <br />
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