2001-02-09_REPORT - C1981025 (2)

Home Browse Search

February 9, 2001 Page 2 of 4 Pages report by reference (Page 4). They were submitted quarterly to the Colorado Division of Public Health and Environment with a copy to the Division. Rule 4.05.14(4)(c)(ii): Water quality data obtained from each monitoring site during the water year; and The report is in compliance with this rule with the exception that water quality data was submitted by calendar year in-lieu-of water year. The CDMG permit requires biannual quality monitoring of the upper and lower North Thompson Creek (provided in Appendix I)[in addition to required parameters (PAP page 3-86), conductivity and temperature were reported]. The quality parameters of CDPS reports are presented (less oil and grease and WET tests) for mine water discharges in the report. Impacts of WET tests are presented in the report. The CDMG permit also requires additional monitoring for quality of Mine Number 1 discharges in June (permit, page 3-86). The date of the sample reported is in July(7/19/00) Results of this monitoring are presented in the report (provided in Appendix IV)[in addition to required parameters (PAP page 3-86), conductivity and temperature were reported]. The CDMG permit requires quarterly monitoring (quality) of wells D-lA and D-2A (permit, page 3-61). The report contains this information. Rule 4.05.14(4)(c)(iii): If required by the Division, a written interpretation of the data and identification of mining related impacts to the hydrologic balance. The report is in compliance with this rule. The Division required no written interpretation of the data, but a summary of impacts is provided in the report. Probable Hydrologic Consequences vs. 1998 Impacts: Probable hydrologic consequences are identified in a number of places in the permit: All monitoring associated with the loadout site was terminated before the report year. No impact to the middle sandstone was anticipated (permit, pages 3-34, 4-118). There is no monitoring associated with the middle sandstone. No impact to the Upper sandstone was anticipated (permit, page 3-48). There is no monitoring associated with the Upper sandstone. Mining activities were anticipated to have "very little effect"on flows of local streams (permit,page 3-49). Monitoring through 1985 did not establish depletion to the North Thompson Creek and Middle Thompson Creek, and monitoring was discontinued in 1986 (permit, page 5-115b).