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Church Ditch Water Authority October 18, 2013 (Updated October 21, 2013) Page 2 of 4 Agenda Item 8j Background The Church Ditch Water Authority runs the Church Ditch, which serves 55 headgates from Golden to Arvada and Westminster. During the unprecedented flood of September 2013 in the tributaries to the South Platte River, a significant number of diversion structures and dams along the river corridor were damaged, including the Authority's Church Ditch. The flood damage has made the Church Ditch inoperable and unable to exercise its decreed water rights. The Church Ditch is a 26 -mile long carrier ditch that delivers water from Clear Creek at its headworks in the mouth of Clear Creek Canyon to its terminus at Dry Creek Valley Ditch north of Standley Lake. During the 2013 flood, several areas of the Church Ditch were damaged and are in need of repair. The most significant damage occurred at the Church Ditch crossing of Leyden Creek approximately 11 miles downstream from the headworks. Prior to the flood, Leyden Creek flowed under Church Ditch in an 84 -inch CMP culvert. During the flooding, flood waters washed out an estimated 100 -foot length of the eastern bank of the Church Ditch and the access road sustained major damage. In addition to the Leyden Creek Crossing, numerous smaller areas had minor damage from sloughing and erosion that need to be repaired. Loan Feasibility Study Cory Peterson, P.E. prepared the Loan Feasibility Study titled "Emergency Loan Application and Feasibility Study," dated October 2013. The study includes an alternative analysis and preliminary engineering design and cost estimates. The study was prepared in accordance with the CWCB guidelines. Borrower — Church Ditch Water Authority The cities ofNorthglenn and Westminster created the Authority pursuant to C.R.S. Section 29 -1- 204.2 through an Intergovernmental Agreement dated October 24, 2004. The Authority's Establishing Contract authorizes the Board to exercise all powers of the Authority. The Authority's source of income is through carriage rates, set by the Authority and charged to its contractual users (inch - holders). The Authority has 98 inch - holders with a total of 5710.64 inches. Water Rights The water rights impacted by this project include TABLE 1: IMPACTED WATER RIGHTS Name Amount (CFS) Appropriation Date Adjudication Date Swadley Ditch 0.90 6/1/1862 10/4/1884 Golden City and Ralston Creek Ditch 41.43 2/28/1865 10/4/1884 Swadley Ditch 1.25 5/16/1865 10/4/1884 Golden City and Ralston Creek Ditch 18.26 11/18/1877 10/4/1884 Golden City and Ralston Creek Ditch 18.85 11/15/1878 10/4/1884 Golden City and Ralston Creek Ditch 32.34 11/20/1881 10/4/1884 Golden City and Ralston Creek Ditch 100.12 3/16/1886 5/13/1936 Golden City and Ralston Creek Ditch 1 185.00 11/18/1887 5/13/1936 Average annual diversions of the Authority are 8,355 AF.