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Surface Water <br />The applicant will conduct monitoring of surface water in a manner approved by the <br />Division. The monitoring plan was submitted under 2.05.6(3)(b)(iv) and can be <br />found in Appendix 15-3a of the permit application package. <br />The hydrologic description of the mine area is provided in Tab 7 of the permit, and <br />the hydrologic monitoring plan is addressed in Tab 15. Hydrologic protection, <br />probable hydrologic consequences, and the hydrologic reclamation plan are <br />presented in Tabs 16, 17, and 18, respectively. <br />Surface water at the Seneca II-W Mine lies within two watersheds. The primary <br />affected area lies within the Dry Creek Drainage and is drained by Hubberson Gulch <br />and an unnamed tributary to Dry Creek. A small portion of the eastern part of the <br />permit area drains to Sage Creek. Both creeks empty into the Yampa River near <br />Hayden. Both Dry Creek and Sage Creek exhibit intermittent to perennial flows, <br />depending on location along the sveams, and precipitation trends. <br />Seneca Coal Company currently monitors two sites downstream of mining <br />disturbance on Hubberson Gulch. The upstream site is monitored monthly for flow <br />and field pazameters, and triannually for the parameters noted in Appendix 15-1 of <br />the permit application package. The downstream site is equipped with a continuous <br />flow recorder and water quality samples are obtained triannually for the parameters <br />listed in Appendix 15-1. Three new sites were added with the approval of PR-02. <br />These sites include SG9, SG16, and SG17. SG9 is the furthest upstream site and is <br />monitored in June and September for field parameters and water quality. Sites SG16 <br />and SG17 are the baseline sites for Ponds 016 and 017, respectively. These sites <br />will be replaced by Colorado Discharge Permit System monitoring once the ponds <br />have been constructed. <br />One site is monitored on Dry Creek, downstream of mining. Flow and field <br />parameters aze measured monthly, and water quality samples for the parameters <br />listed in Appendix 15-1 are taken triannually. <br />SCC monitors one site on Sage Creek. Flow and field parameters are recorded <br />monthly upstream, and triannual samples are taken for the parameters listed in <br />Appendix 15-1. <br />SCC monitors one site on a south tributary of Sage Creek. This site, CGI, will be <br />discontinued upon construction of Pond 015 and will be replaced by Colorado <br />Discharge Permit System monitoring. <br />Seneca Coal Company has installed a sediment control system to divert, convey <br />and/or treat surface water runoff in and around the mine site. The sediment control <br />Seneca II-W Findings Documen[ 25 November 3, 1999 <br />