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I I I I I I I I I I I I I I I I. I I I EMPIRE RESERVOIR EAST EMBANKMENT DAM EMERGENCY REPAIR FEASIBILITY STUDY DAMID 010728, WATER DIVISION 1, WATER DISTRICT 1 CONSTRUCTION FILE NO.: C-0465D Dam Owner: Bijou Irrigation District November 29, 2007 Puroose Empire Reservoir is located in Weld and Morgan Counties, approximately 3 miles southeast of Masters, Colorado and 3 miles west of Wiggins, Colorado as shown in Appendix A. The reservoir is an off channel irrigation and recreation storage facility that is owned and operated by the Bijou Irrigation District. The normal capacity of the reservoir is 37,710 acre-feet at a gauge height of 30 feet. In the spring of 2007, the dam experienced significant wave erosion along sections ofthe East Embankment. In particular, two sections of the existing parapet wall failed and significant erosion occurred near existing cottonwood trees along the upstream toe of the East Embankment. Following the yearly inspection of the dam by the State Engineer's Office (SED), the dam was put on a fill restriction to a gauge height of 29 feet. Based on these events, Applegate Group, Inc. was retained by the Bijou Irrigation District to prepare Construction Plans for the Rehabilitation of the East Embankment Dam located at Empire Reservoir. These plans have been submitted to the SED for review and approval is expected in early December, 2007. Proiect Soonsor The Bijou Irrigation District (Bijou) is an irrigation district located in northeast Colorado utilizing waters of the South Platte River. Bijou was formed under and is governed by state statute, specifically C.R.S. Title 37 - Articles 41,42 and 43. Bijou receives the majority of its irrigation water through its ownership of the Empire Reservoir. Bijou can fill Empire Reservoir under a 1905 decree and a 1929 refill decree. The reservoir can be filled through the Empire inlet canal, which has capacity to divert 575 cubic feet of water per second of time (cfs), from the South Platte River at a headgate located about 3 miles East of Kersey, Colorado. Water from Empire Reservoir is delivered to the lands of the district through the Bijou Canal. The Bijou Canal is owned and operated by the Bijou Irrigation Company of which Bijou Irrigation District is the majority stockholder. Based on the State Engineer's diversion records from 1989 through 2005, Bijou has had an average annual diversion of 50,970 acre-feet for all water diverted into Empire Reservoir. Empire Reservoir East Embankment Dam, Water Division 1 DAMID 010728 Page 1