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REP07277
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Entry Properties
Last modified
8/24/2016 11:37:31 PM
Creation date
11/26/2007 11:34:47 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
12/10/2003
Doc Name
2002 AHR Review Letter
From
DMG
To
Mountain Coal Company
Annual Report Year
2002
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />10 December 2003 <br />Mr. Henry Barbe <br />Mountain Coal Company <br />P.O. Box 591 <br />Somerset CO 81434 <br />Dear Mr. Bazbe: <br />The Division has completed review of Mountain Coal Company's Annual Hydrology <br />Report for 2002 at the West Elk Mine. The report was complete but several comments <br />were generated by the review, which we request you consider for the 2003 report. <br />COLORADO <br />DIVISION OF <br />MINERALS <br />GEOLOGY <br />0.E CLAMATION•NIN ING <br />SAf ETY•SCIENCE <br />Bill Owens <br />Governor <br />Greg E. Walther <br />Executive Director <br />Ronald W. Cattany <br />Division Director <br />Natural Resource TruAee <br />(1) The effects of continued drought are evident in the water quantity of the springs and <br />those wells completed into coltuvium and even alluvium. It is interesting to see that there <br />doesn't seem to be much effect from the drought on wells completed in formations, <br />further indication of the very limited communication between the water contained within <br />the coal and associated units and the environment. <br />(2) The distinction is made every year on the location of monitored springs, dividing <br />them into those above the F-seam, below the F-seam and two other categories. The <br />significance of the distinction has been lost in history and it is not explained in either the <br />AHR itself or in the PAP. It would be appropriate if, in the future, the narrative in the <br />AHR would either reiterate the significance of the spring location or present some other <br />new disfinction that relates to points being made within the AHR. <br />(3) On the mine water inflow map, the description on location HDH#4 shows that <br />"initial flow was >100 gpm." There is no indication of the volume at which the flow <br />stabilized. The initial flow rate is good information, but the consistent, stabilized flow is <br />most valuable in the report. lr3 the future, please note the stable flow. <br />(4) There aze inconsistencies in the discussion of mine inflows on page 23 and 24 of the <br />report. Section 4.5 states that WY2002 experienced 154 acre-feet of mine inflow while at <br />the bottom of the page, total mine inflow is stated as 206 acre-feet. Please explain the <br />discrepancy as the numbers regarding inflow and outflow aze not consistent across that <br />section of the AHR. <br />(5) There appeazs to be no impact on surface water from pond discharges. <br />Office of <br />Mined Land Reclamation <br />Active and Inactive Mines <br />Colorado <br />Geological Survey <br />
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