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In order to comply itn [nis aecreed plan for augmentation, Peabody has entered into two water <br />leasing agreements ith the owners of significant righted water sources IJ.C. Temple Reservoir No. 1, <br />Emrich Reservoir, an Stagecoach Reservoirl. Details related to the amounts of water leased from <br />these owners can be found in Appendix 16-1 (see Water Lease Agreement - Camilletti, and Agn:ement <br />- Upper Yampa Wa er Conservancy Districtl. Finally, Peabody has constructed a table that lists <br />monitoring sites, in trurnentation, parameters, and frequencies associated with the accounting of <br />depletion's and cre its as required by the approved plan for augmentation Isee Appendix 16-1, <br />Monitoring Plan for Compliance with the Plan for Augmentationl. This monitoring plan has been <br />reviewed and approv d by the Division Engineer, Division 6, Water District 57. <br />Appendix 16-2, Sene a II~~W Average Annual Water Depletion Estimate, presents the estimate of water <br />depletion with regard~[o the OSM Windy Gap process. <br />Alluvial Valley Floors <br />Introduction. An Iluvial valley floor (AVF) analysis was performed by Keammerer Ecological <br />Consultants and Gol er Associates, Inc. during the late summer and fall of 1990 for Peabody Coal <br />Company. The purp se of the study was to evaluate the drainages in the vicinity of the Seneca II-W <br />Mine relative to their potential as alluvial valley floors. The drainages that were evaluated include Dry <br />Creek, Sage Creek, and Grassy Creek. Grassy Creek will not be specifically addressed in this <br />discussion as it is n t in hydraulic communication with the Seneca II-W property. The study area <br />included the length f Dry Creek from upstream of the Seneca II-W Mine to the town of Hayden and <br />the length of Sage Creek from upstream of the Seneca II-W Mine to [he railroad embankment <br />updrainage of the co fluence of Sage Creek and the Yampa River. The lateral extent of the study area <br />was defined by the x[ent of valley fill and alluvial deposits. Color aerial photographs 11"=1,000' <br />scalel, false color in raved photographs 11"=34,000' scalel, and USGS surficial geology maps were <br />utilized in addition to extensive field checking. <br />Geomorphology. A ~eologic deposits map (Exhibit 16-21 was constructed as part of the geornorphic <br />analysis. Six types of geologic deposits were identified along the stream courses. These were <br />anthropogenic fill, al uvium, valley fill deposits, fan deposits, <br /> <br />73 Revised 8127/99 <br />