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1981-08-20_GENERAL DOCUMENTS - C1981038
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1981-08-20_GENERAL DOCUMENTS - C1981038
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Last modified
12/5/2020 8:56:39 AM
Creation date
8/8/2012 9:04:49 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981038
IBM Index Class Name
General Documents
Doc Date
8/20/1981
Doc Name
Proposed Decision & Findings
From
DRMS
To
Colorado Westmoreland, Inc
Permit Index Doc Type
Findings
Email Name
BFB
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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-12- <br /> MONITORING SCHEDULE, GROUNDWATER LEVEL DATA AND WATER QUALITY DATA PRIOR <br /> TO MINING THIS PANEL. <br /> In order to evaluate potential hydrologic impacts of the mine site on ground- <br /> water, Colorado Westmoreland will need to install a groundwater monitoring <br /> well below the lowermost sedimentation pond. This corresponds to drainage <br /> node 22, as shown on Map 13. <br /> THE OPERATOR SHALL INSTALL AND BEGIN MONITORING ONE MONITORING WELL <br /> LOCATED AT DRAINAGE NODE 22, AS SHOWN ON MAP NO. 13. THE WELL SHALL BE <br /> COMPLETED WITHIN THE BEDROCK BELOW THE 1URFICIAL MATERIAL WITHIN 60 DAYS <br /> OF THE PERMIT ISSUING. WATER LEVELS, pH, ELECTRO-CONDUCTIVITY, AND <br /> TEMPERATURE IN THIS WELL MUST BE MONITORED MONTHLY AS WEATHER PERMITS, <br /> AND WATER QUALITY SAMPLES SHALL BE DRAWN QUARTERLY FOR THE PARAMETERS <br /> LISTED IN APPENDIX A. THIS MONITORING DATA MUST BE SUBMITTED TO THE <br /> DIVISION QUARTERLY. THE APPLICANT SHALL SUBMIT TO THE DIVISION A <br /> WELL COMPLETION REPORT AND MONITORING SCHEDULE WITHIN 30 DAYS AFTER THE <br /> WELL IS COMPLETED. <br /> Effects of Mining on Surface Water <br /> The Orchard Valley mine plan is designed to minimize the impacts of the project <br /> on the surface water hydrology of the region. Disturbed area drainage from <br /> the mine benches' , parking area, and loadout site is collected and treated on <br /> the site. Four sediment ponds collect disturbed area drainage from the mine <br /> benches, one pond controls drainage from the parking area, and two ponds collect <br /> drainage from the disturbed areas' of the loadout, truck scales, and emergency <br /> coal stockpile area. A system of lined and unlined ditches convey waters from <br /> the disturbed areas to the ponds. The mine operator has obtained the appropriate <br /> NPDES permits. Effluent quality from the sedimentation ponds will be monitored <br /> to determine permit compliance. <br /> Runoff from the waste disposal sites is routed through the sediment control <br /> system and must meet effluent limitations. Final design for the waste rock <br /> piles, which would include a surface drainage system, has not been submitted <br /> to date. Submission of the completed design has been stipulated in the Waste <br /> Disposal section of this findings document. <br /> The hydrologic consequences of mining operations during the first five years of <br /> mining are expected to be minimal. The applicant reports that no degradation <br /> of water quality in surface streams is expected. Any effluent will be treated <br /> as necessary to meet quality standards prior to discharge. <br /> The applicant has indicated, on page 140, Section 2.05 of Volume 8A, that <br /> surface water monitoring will -be conducted at two sites, one near the mine site <br /> and one below the lowermost sedimentation pond (drainage node 22) . In order <br /> to ensure that all necessary water quality parameters are included in the <br /> monitoring data, the following stipulation is necessary: <br /> THE OPERATOR'S QUARTERLY SURFACE WATER MONITORING REPORTS SHALL INCLUDE <br /> THE WATER QUALITY TESTING PARAMETERS LISTED IN APPENDIX A, BASELINE <br /> WATER QUALITY MONITORING. <br /> t <br />
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