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August 2001, when it was abandoned and subsequently mined through. S-7 serves <br />as the non-potable water supply for the Smith Ranch on Hubberson Gulch in <br />Section 21. Sampling was discontinued in 1990 but reinitiated in 1999, due to its <br />location downstream from south extension area mining. Monitoring was <br />conducted between 1999 and 2005, when it when discontinuance of <br />monitoring was approved in TR-52. TDS values peaked in 1997, and <br />decreased in subsequent years. <br />A discussion of projected impacts can be found in Section III F. -Assessment of <br />Probable Hydrologic Consequences of Mining. <br />SCC performs a spoil spring survey following snowmelt each year, with locations <br />of springs of greater than 5 GPM added to the monitoring program, with spring <br />location and monitoring data to be included in subsequent Annual Hydrology <br />Reports. An annual total of approximately 2 full-suite samples and 4 field <br />parameters samples are collected each year, timed in order to characterize water <br />quality 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 approved by <br />the Division. The monitoring plan was submitted under 2.05.6(3)(b)(iv) and can be <br />found in Appendix IS-3A of the permit application package. A number of <br />amendments to the surface water parameter list and analytical techniques for <br />certain parameters were approved in TR-52, in 2005. <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 <br />Gulch and an unnamed tributary to Dry Creek (the Pond 005 Gulch). A small <br />portion 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 Creek exhibit <br />intermittent to perennial flows, depending on location along the streams, and <br />precipitation trends. Hubberson Gulch is intermittent. <br />_ Hubberson Gulch Watershed <br />Seneca Coal Company currently (October 2004) monitors one upstream site (SG9) <br />and two sites downstream of mining disturbance on Hubberson Gulch (SG7 and <br />FGl). These are in addition to NPDES monitoring sites located at Pond 017 <br />Seneca II-W Findings Document 39 June 12, 2006 <br />Permit Renewal No. 5 <br />