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April 11, 2003 <br />Page 3 of 3 Pages <br />Water quantity data was submitted by calendaz year in-lieu-of water year (Permit, page 4.05-I 1). <br />Water quantity data is required for surface flows at the New Upper Goodspring Creek, Lower <br />Goodspring Creek, and Lower Taylor Creek surface water-monitoring sites. Monitoring data is <br />provided in Exhibit 2A of the report. Water quantity data is submitted in Discharge Monitoring <br />Reports (DMR) of the sedimentation ponds. This information is submitted to the Division as <br />copies of the DMRs at the same frequency as they are submitted to the Colorado Department of <br />Public Health and Environment (quarterly). The Division reviews them upon receipt. As <br />mentioned above, they are included in this AHR by reference. <br />Rule 4.05.14(4)(c)(ii): Water quality data obtained from each monitoring site during the water year; <br />and <br />Water quality data was submitted by calendar year in-lieu-of water year (Permit, page 4.05-11). <br />Water quality data is required for surface flows at the New Upper Goodspring Creek, Lower <br />Goodspring Creek, and Lower Taylor Creek surface water-monitoring sites. This information <br />was submitted in Exhibit 2A of the AHR. Water quality data is submitted in Discharge <br />Monitoring Reports (DMR) of the sedimentation ponds. This information is submitted to the <br />Division as copies of the DMRs at the same frequency as they are submitted to the Colorado <br />Department of Public Health and Environment {quarterly). The Division reviews these reports <br />upon receipt. They were not included in the AHR by reference. Water quality data is also <br />required for the three monitoring wells (Gossard, North Goodspring, and A6 Wells). This <br />information is provided at Exhibit 2B of the AHR. <br />Rule 4.05.14(4)(c)(iii): If required by the Division, a written interpretation of the data and <br />identification of mining related impacts to the hydrologic balance. <br />The report is incompliance with this rule. The Division required no written interpretation ofthe data. <br />However, Colowyo has provided a general discussion of where monitoring reports are, and general <br />trends of changes in water quality. <br />The probably hydrologic impact (PHC) from mining activities [Permit, page 2.05-75; Rule 2.05.6(2)] <br />is that "Surface water will not be significantly impacted in the mine area". The PHC continues <br />(Permit, page 2.05-75) "In summary, the Colowyo Mine will not significantly affect the hydrologic <br />balance or water quality of the general area or the permit area and the affect to the hydrologic balance <br />within the permit area will be insignificant. Temporary increases in TDS and associated common <br />ions are expected to affect quality in backfilled spoils within the permit azea." From information <br />available at this time, this review concludes that the impacts on water quality and quantity from <br />mining activities as the Colowyo Coal Mine are within the probable hydrologic consequences as <br />permitted. <br />file: C-1982-019 2002 AHR <br />C:\ W PDOCS\Col owyo\ahrrvw0l.doc <br />