2008-03-31_PERMIT FILE - C1980007A ‎(34)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2008
• Doc Name: 2.04-51 Thru 2.04-113
• Section_Exhibit Name: 2.04.7 Hydrology Description
• Media Type: D
• Archive: Yes

West Elk Mine
•
Table 10
Baseline Monitoring Schedule
Month Flow Field Parameters Chemical Analysis
Janua
February
March
April
May
June "
Jul '
'August
September
October
November
December
Note:
1. Sampling will not be done during winter conditions or when access is difficult.
MCC has selected the baseline water quality parameters in Table 11 for routine measurement to
characterize the water. Water quality changes that result in conditions that are known to mobilize
metals would likely cause iron or manganese to be released in detectable quantities. Additionally,
changes in conductivity and total dissolved solids (TDS) indicate changes in water quality that may
need to be further investigated. As a result, monitoring of these selected parameters will provide a
detection system for potential mining-induced changes in water quality. Therefore, once full suite
• analyses have been collected at a site for at least five years, these indicator parameters (pH,
conductivity, TDS, TSS, and iron) will be collected on an annual basis.
Analyses are completed as outlined in the Guidelines for Collection of Baseline Water Quality and
Overburden Geochemistry Data (CDMG 1982). Results are reported in the Annual Hydrology
Reports. If not already provided in the AHRs, baseline data will be provided to CDRMS prior to
longwall mining under or within the angle-of-draw of a monitored resource. A summary and
discussion of water quality data collected from surface water monitoring stations is shown in Table
17 and the accompanying text.
Spring Monitoring
Spring Quantity
In 1977, MCC began a spring water monitoring program that incorporated monthly, quarterly and
semi-annual monitoring of flow and/or water quality. Map 37 shows the springs identified within
the coal lease area and the locations of the decreed springs. Springs that are included in the
monitoring program are presented in Exhibit 71. The most recent Annual Hydrology Report
provides a graphic representation of the flow data available for the springs monitored from 1984 to
date.

2.04-88 Revised A'ovember 2004 PRIG, March 2006; Rev. April 2006 PRIG; Rev. May 2006 PRIO; Sep. 2007 PR12; Feb. 2008 PR12