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DAM EMBANKMENT EMBANKMENT: The Cactus Park Dam would be an earth structure and would be a jurisdictional intermediate Class I dam. The "Rules and Regulations for Dam Safety and Dam Construction" prepared by the Colorado State Engineer, Division of Water Resources, state the following criteria should be met: * a minimum of 5 feet of freeboard, * an outlet pipe capable of draining the top 5 feet of storage in 5 days, * a crest width equal to the vertical height divided by 5 plus 10 feet, maximum of 25 feet, * a spillway capable of passing 100$ PMP, * upstream rip rap to protect the embankment, * and soils investigation and analysis. Plans and specifications must be prepared and approved by the State Engineer prior to beginning construction. USBR has performed most, if not all, of the field testing necessary to design the dam. The reconnaissance designs described herein are based upon data contained in the PRC report; more detailed engineering work may result in a different design. The proposed dam is planned to be a zoned earthfill structure with 3.OH:1.OV upstream and 1.75H:1.OV downstream slopes with a 30 foot wide crest (Western Engineers report). It is assumed that the PRC report used the same preliminary design. For the proposed capacity of 15,900 acre-feet the dam height would be about 170 feet with an embankment volume of about 3,400,000 cubic yards (PRC report). The spillway and outlet works are not described in the PRC report. RELATED STRUCTURES: The PRC report described: (1) The Surface Creek Feeder canal to collect and convey water from streams and irrigation return flow to Cactus Park Reservoir. The canal would be about 7.7 miles long and vary in capacity from 80 cfs to 200 cfs. (2) The Cedaredge Canal would convey reservoir releases to various points in the irrigated area. The canal would be 10.2 miles long with a capacity varying from 50 cfs to 150 cfs. Cactus Park Dam 6