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<br />. <br /> <br />. <br /> <br />~C!('991 <br /> <br />ENGBR <br />824. 02 (Purgatoire (Picket Wire) River, Colorado) <br />Subject: Purgatoire River, Colorado <br /> <br />the conservation capacity in accordance with conditions d and e, on the <br />utilization of John Martin Reservoir for irrigation under the terms of <br />Arkansas River Compact are indeterminate from existing stream flow <br />records. The district engineer estimates the total first cost of the <br />dam and reservoir project at $17,000,000, at November 1952 price levels, <br />and the annual charges at $552,000, including $22,000 annually for main- <br />tenance and operation. Annual benefits projected over the project life <br />are evaluated at $590,000, of which $275,000 is from flood control in- <br />cluding $26,000 due to land enhancement, $290,000 from irrigation with <br />operation in accordance with conditions a, b, and c, $13,000 from fish <br />and wildlife, and $12,000 from recreation. The benefit-cost ratio is <br />1.07. The district engineer recommends that the authority for the ex- <br />isting project be withdrawn; that Trinidad Dam and Reservoir project on <br />Purgatoire River, Colorado, be constructed by the Corps of Engineers; <br />that the United States contribute to the maintenance and operation of <br />the reservoir project, in proportion to the storage allocated to flood <br />control, at an estimated annual cost of $10,000, provided that about <br />46,700 acre-feet of flood-control storage be reserved in the reservoir <br />above elevation 6,251, and this storage be operated in accordance with <br />regulations prescribed by the Secretary of the Army; and that prior to <br />the start of construction contracts be negotiated between the United <br />States and a legally organized conservancy district for the delivery of <br />the water supplies at equitable charges which would pay annual irrigation <br />operation, maintenance, and replacement costs, estimated at about $12,000, <br />and retire without interest all first costs of construction allocated to <br />irrigation estimated at about $8,732,000, such annual charges to be with- <br />in payment capacity of the water users and related to water supplies and <br />agricultural prices. Further, the district engineer concurs in certain <br />recommendations furnished him by the Bureau of Reclamation. <br /> <br />7. The division engineer considers that the estimates of economic <br />1uetificetion nertaining to the irriuetion eenecte nf thp n~n~n~pn nlAn <br />