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Emergency Loan Application and Feasibility Study Oligarchy Irrigation Company Name Water Court Case Appropriation Date Adjudication Date Amount (cfs or AF) Avg. Annual Yield (AF) Oligarchy Ditch CA1335 6/1/1866 6/2/1882 43.95 cfs 8,270 Odagarcb Dl ch CA- 1-3.3 -5— __TZ/ 71 °870 —612-/T992---9-8-,6-5 cfs Oligarchy Ditch CA1335 m 3��7 6C2 /T&& 36,846-f Oligarchy Ditch CA1335 4/1/1874 6/2/1882 58.07 cfs Union Reservoir CA4790 10/6/1902 3/13/1907 13,219AF 3,830 Union Reservoir W7486 5/1/1973 3/11/1977 5,879 AF McIntosh Reservoir CA4790 10/8/1902 3/13/1907 2460 AF 1,510 McIntosh Reservoir CAI 1715 12/31/1929 7/23/1951 2460 AF Note: Yields of the separate water right have never been aeterrninea. J nererore, Hverage i- ),1uJua, z xlub uuz�ul cuuv above are the historical average amounts for each structure based on Water Court transfer proceedings. Union and McIntosh yields are at the reservoirs. Due to differing periods of record, the yields above are not equal to the average annual diversions presented in the Agency /Company information shown previously. Project Description The project goal is to reconstruct the Oligarchy Ditch diversion structure on St. Vrain Creek that was destroyed by the September 12 – 16, 2013 flood, including the diversion darn, the sand gate, the Rubicon flumegate, the headgates, and the bypass gate. The Company has retained Deere and Ault Consultants, Inc. and their licensed Professional Engineers to provide design and construction review services. Alternative 1 --- Do Nothin : This alternative is considered unacceptable. Failure to replace the Oligarchy Ditch diversion structure would prevent the diversion of the Company's water rights and the inability to uphold the Company's responsibility to deliver Union Reservoir and McIntosh Reservoir water rights to those respective storage facilities. Alternative 2 – Rebuilding Collaboratively with Improvements: The Oligarchy Ditch already serves multiple users and interests including its shareholders and the owners of McIntosh Reservoir and Union Reservoir. In addition, the Rubicon flumegate serves the interests of the St. Vrain Creek Corridor Committee for preserving streamflow past the structure. Because of the relatively isolated location of the Oligarch Ditch diversion, there is no feasible means of serving additional multiple interests. The nearest headgates are nearly one mile upstream and nearly one mile downstream. The next downstream diversion is on the opposite side of St. Vrain Creek. At the Oligarchy Ditch diversion, St. Vrain Creek is currently in its pre -flood channel so there is no need for collaborative stream relocation. The selected alternative below represents a collaborative rebuild with improvements.