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. . . Arkansas Valley Conduit November 13-15, 2006 Agenda Item10a Water RiQhts Proiect Water - The District has rights to import water from the western slope through the Fryingpan-Arkansas Project. The original estimated yield of the project was 69,100 acre-feet, but the past 25 year historical average of allocations has been about 48,160 acre-feet. Of this diversion, 12% is reserved for municipalities east of Pueblo for domestic use. This has averaged about 5,779 acre-feet per year. This is the water that is expected to be taken down the conduit to these municipalities. Return Flows - Pursuant to the USBR Repayment Contract, the District, through the Enterprise, retains dominion and control over all Fry-Ark Project return flows. These return flows can be exchanged (1939 decree) back up to Pueblo Reservoir where they are available to the originating entity for reuse. These return flows can provide up to an additional 1,600 acre-feet of water. Storage is available to these entities in Pueblo Reservoir because they are in the SECWCD service area. This storage will help provide water in the years when less than average water is provided by the Fry-Ark Project. Taking return flows into consideration will help meet the current demand that the municipalities are requesting down the conduit. Future growth beyond these yields will require the acquisition of additional water rights to meet any future demands. There is currently no limitation that only Fry-Ark Project water can be taken down the conduit. Thus, there is opportunity for additional water to be available to the conduit for future growth. As much as an additional 6,700 AF would be required to meet 2050 demands. A summary of project water is: Fry-Ark 12% allocation Municipal Return Flows 5,779 AF 1.600 AF (776 AF needed to meet 2005 Requested) 7,379 AF 2005 Requested Amount 6,555 AF Proiect DescriDtion The conduit will begin at Pueblo reservoir about 5 miles west of Pueblo, and continue approximately 138 miles to Lamar. The pipe will be gravity flow, and the size will vary from 42" at Pueblo Reservoir to 24" when it reaches Lamar. The conduit will continue east, making deliveries of water to each entity along the way and there will be several spurs that will take off of the main conduit and provide water to local and regional treatment facilities. An outlet works for the conduit already exists at Pueblo Reservoir. This outlet works has reserved 30.94 cfs of capacity for the Arkansas Valley Conduit. From the outlet works at Pueblo Dam it is expected that the conduit will follow the Bessemer Ditch right-of-way to a point on the St. Charles Mesa east of Pueblo. This will allow for a gravity flow pipeline, thus alleviating the need for any pumping. At a point near the St. Charles Mesa Water Treatment facility, the pipeline will provide a spur to the St. Charles Mesa Water Treatment facility and then run the water through a filtration plant before continuing down the Arkansas valley. By filtering the water at this point, each provider will only have to chlorinate the water for delivery to their customers. Once the conduit reaches Ordway, a spur will angle to the northeast to provide water to all of the entities within Crowley County. The main line will continue east with spurs branching off to various regional water providers along the way. The conduit will terminate at the City of Lamar water treatment facility. It is planned to provide operational storage at two locations along the conduit to regulate pressure as wellas provide storage for emergency and maintenance purposes. Page 5 of 12