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will then be collected each year, timed in order to characterize water quality <br />and flow during the high-water and low-water seasons. <br />Surface Water <br />The applicant will conduct monitoring of surface water in a manner <br />approved by the Division. The monitoring plan was submitted under <br />2.05.6(3)(b)(iv) and can be found in Table 1 of this document. <br />The hydrologic description of the mine area is provided in Tab 7 of the <br />permit application package, and the hydrologic monitoring plan is addressed <br />in Tab 15. Hydrologic protection, probable hydrologic consequences, and <br />the hydrologic reclamation plan are presented in Tabs 16, 17, and 18, <br />respectively. <br />Surface water at the Seneca II-W Mine lies within two watersheds. The <br />primary affected area lies within the Dry Creek Drainage and is drained by <br />Hubberson Gulch and an unnamed tributary to Dry Creek. A small portion <br />of the eastern part of the permit area drains to Sage Creek. Both creeks <br />empty into the Yampa River near Hayden. Both Dry Creek and Sage <br />Creek exhibit intermittent to perennial flows, depending on location along <br />the streams, 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 <br />for flow and field parameters, and triannually for the parameters noted in <br />Table 3 of this document. The downstream site is equipped with a <br />continuous flow recorder and water quality samples are obtained triannually <br />for the parameters listed in Table 3 of this document. <br />One site is monitored on Dry Creek, downstream of mining. Flow and field <br />parameters are measured monthly, and water quality samples for the <br />parameters listed in Table 3 are taken triannually. <br />Seneca monitors two sites on Sage Creek, upstream and downstream of <br />mining. Flow and field parameters are recorded monthly upstream. At the <br />downstream site Seneca Coal Company continuously records flow, with field <br />parameters taken monthly. Triannual samples are taken at both sites for <br />the parameters listed in Table 3. <br />Seneca Coal Company has installed a sediment control system to divert, <br />convey and/or treat surface water runoff in and around the mine site. The <br />sediment control system includes three sedimentation ponds (Ponds 005, <br />006, and 009). Amore complete discussion of this system is contained in <br />Section III.C. of this document. <br />24 <br />