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In order to comply with this decreed plan for augmentation, Peabody has entered into two water <br />leasing agreements with the owners of significant righted water sources (J.C. Temple Reservoir No. 1, <br />Emrich Reservoir, and Stagecoach Reservoir). 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 Agreement <br />- Upper Yampa Water Conservancy District). Finally, Peabody has constructed a table that lists <br />monitoring sites, instrumentation, parameters, and frequencies associated with the accounting of <br />depletion's and credits as required by the approved plan for augmentation (see Appendix 16-1, <br />Monitoring Plan for Compliance with the Plan for Augmentation). This monitoring plan has been <br />reviewed and approved by the Division Engineer, Division 6, Water District 57. <br />Appendix 16-2, Seneca II-W Average Annual Water Depletion Estimate, presents the estimate of water <br />depletion with regard to the OSM Windy Gap process. <br />Alluvial Valley Floors <br />Introduction. An alluvial valley floor (AVF) analysis was performed by Keammerer Ecological <br />Consultants and Golder Associates, Inc. during the late summer and fall of 1990 for Peabody Coal <br />Company. The purpose 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 not in hydraulic communication with the Seneca II-W property. The study area <br />included the length of 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 the railroad embankment <br />updrainage of the confluence of Sage Creek and the Yampa River. The lateral extent of the study area <br />was defined by the extent of valley fill and alluvial deposits. Color aerial photographs (1"=1,000' <br />scale), false color infrared photographs (1"=34,000' scale), and USGS surficial geology maps were <br />utilized in addition to extensive field checking. <br />Geomorphology. A geologic deposits map (Exhibit 16-2) was constructed as part of the geomorphic <br />analysis. Six types of geologic deposits were identified along the stream courses. These were <br />anthropogenic fill, alluvium, valley fill deposits, fan deposits, <br />i <br />13 Revised 8/27/99