Water is supplied to the WyCoalGas Coal Gasification Plant from four major facilities: the Mortons Area Well Field; Panhandle Reservoir No. 1; the Green Valley Well Field; and LaPrele Reservoir. The Mortons Area Well Field is located approximately three miles west of the proposed gasification plant. Panhandle reservoir No. 1 and the auxiliary pump station are located approximately thirteen miles southwest of the plant site. The Green Valley Well Field Area and LaPrele Reservoir are located approximately twenty-five miles southwest of the plant area. This report deals with the systems to bring the various water supplies to the plant site and focuses on Panhandle Dam No. 1 and appurtenances. Panhandle Reservoir No. 1 and appurtenances consist of a zoned earthen embankment, spillway, outlet works, pump station, intake channel, and intake structure. The proposed embankment dam will be a zoned earth embankment approximately 114 feet high above the original ground surface at Soldier Creek with a crest elevation of 4976 and a crest length of approximately 6500 feet. The upstream slope of the embankment will be 3H:1V and the downstream slope of the embankment will be 2.5H:1V. The dam will have a compacted earth cutoff excavated 10 feet into the underlying bedrock. Four zones of earthwork are planned in the embankment. these are described in detail.