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" Bijou Irrigation District May 24-25, 2005 Agenda Item 150 Outlet Dam NW Dam Mcintyre Dam East Dam 2300 feet 1900 feet 4100 feet 12,500 feet . The lake has a surface area of 2842 acres. BID has a right to store 37,709 AF, but the maximum storage is 36,142 acre-feet at gage height (GH) 30.0. The outlet works is located in the northwest corner of the reservoir in the Outlet Dam, and the reservoir has no service or emergency spillway. The area of the upstream basin is approximately 11.5 square miles. The land occupied by Empire Reservoir is held by various owners (BID, Bureau of Land Management, State Division of Wildlife, and private individuals and groups), but BID holds an easem.ent for the reservoir. BID has several recreation leases for boating and hunting. The reservoir is currently restricted (since March 1985) to GH 29.0 water surface elevation by the State Engineer's Office (SEO), due to safety concerns resulting from the absence of a spillway. Additionally, the SEO is concerned about the stability of the embankments during flood stage. The SEO has directed BID to design and construct a spillway to provide unrestricted drawdown of flood storage, and to perform a geotechnical evaluation of the embankments for stability during inflow design flood conditions and subsequent water surface drawdown. The SEO has concerns about seepage increases and stability due to the additional head from the storm inflow. The intent of the proposed project is to provide a spillway and other improvements as required by the SEO, and to increase the normal high waterline to GH 30.0. The project will consist of the construction of a new unregulated 40' wide spillway and outfall channel with a crest elevation at GH 30.0, if allowed by the SEO during final design review: The SEO will ultimately determine the safe . storage level through the design review process. The proposed one-foot increase in storage height would result in 2,682 AF of recovered storage. In addition, the project will include 4,400 lineal feet of toe drain at two embankment locations, in the Outlet Dam and the Mcintyre Dam. Feasibility Studies Tetra Tech RMC, Inc. of Longmont, has completed the feasibility study in accordance with CWCB guidelines. The study includes an assessment of alternatives to address spillway and dam stability concerns. Biiou Irriaation District IRe BID was formed in 1905 by resolution of th"e MorgarrCountY Commissioners and" operates as' - ..- an Irrigation District under the Irrigation District Law of 1905 (C.R.S. 37-41-101 to 160), including amendments in C.R.S. 37-43-101 to 211. The BID office is located in Fort Morgan. The Morgan County Treasurer serves as the ex officio BID Treasurer and collects and distributes taxes and assessments, in the same manner as property taxes are collected. Money is distributed to the BID on a monthly basis. Affairs of the BID are governed by a 5-member Board of Directors, serving 3- year terms, and a Secretary that is appointed. Three Directors are from geographic divisions, and two serve at-large. Division Directors are Donald Neb, President, John Randal Rusch, Vice- President, and Douglas Dill, Director. At-large Directors are Mike Groves and Larry Krening. The Secretary is Kathy Samples. Typically, about 65% of the BID budget comes from tax revenues, 25% from boating/recreation leases, and 10% from other sources. BID opens the reservoir to multiple boating clubs that provide a source of revenue in the form of permit fees. Currently, 323 . permits are for sale each year for a fee of $250 each. In 2004, the total revenues for BID were $296,500. Page 2 of6