2010-03-12_REPORT - C1981019 (7)

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Colowyo Coal Company 2009 Annual Reclamation and Hydrology Report • SECTION 2 - SURFACE AND GROUND WATER DATA RULE REQUIREMENT RULE 4.05.13(4)(c) Monitoring Report Requirements (surface and ground water) Rule 4.05.13(4)(c) (i) Water quality data for the four surface monitoring sites is presented in Exhibit 2A of this report. (ii) Water quality data obtained from the three surface and six ground water sites is presented in Exhibit 2A and 2B of this report. Discharge monitoring reports are submitted to the Colorado Department of Public Health and Environment on a quarterly basis. A copy is forwarded to the CDRMS and is included in this report by reference. (iii) A written interpretation of the data is not required by the Division. All analytical results from surface and ground water monitoring have been tabulated • and are kept on file at Colowyo Coal Company L.P. Historical data is presented in this AHR. The monitoring timeframe for this annual report is from January 1, 2009 through December 31, 2009. A description of the surface and ground water monitoring plan is located in Colowyo's CDRMS Permit, Volume 1, Section 4.05.13 on page 4.05-10 of the permit. GENERAL DISCUSSION Surface Water Data - Surface water monitoring sites comprise two upstream and two downstream sites and are briefly described below (See Exhibit 2C for location). Surface water monitoring changed from monthly to quarterly in July of 2008, due to the approval of PR-02: • New Upper Good Springs Creek (NUGSC) - upstream site, located south of the mine along Moffat County State Highway 13 and represented on the Surface & Ground Water Sampling Sites Map located in Exhibit 2C. Monitoring has occurred from 1992 to 2009 • Lower Good Spring Creek (LGSC) - downstream site, located below active • mining conditions along Moffat County State Highway 13 and represented on Page 2-1