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<br /> <br />. <br /> <br />CHAPTER IV <br /> <br />GRAVITY PIPELINE PLAN <br /> <br />Irrigation <br /> <br />Irrigation benefits are estimated at $310,200 annually, including <br />$254,500 in direct benefits and $55,700 in indirect and public benefits. <br />The benefits were based on the values discussed in Chapter III, with ad- <br />justments made to reflect the gradual shift of the project water supply <br />from irrigation to outdoor residential use. <br /> <br />Outdoor Residential Use <br /> <br />Benefits from outdoor residential use are estimated at an average <br />of $860,200 annually, based on the cost of the cheapest single-purpose <br />alternative means of development. The alternative considered was based <br />on purchase of water from Ruedi Reservoir at $lO an acre-foot, with the <br />water pumped from the Roaring Fork River and delivered through a Landis <br />Canal and laterals. The pumping plant would be located on the Roaring <br />Fork River about 4 miles below Basalt and would lift water to the head <br />of the Landis Canal. An estimate was made of the cost of pumping the <br />full supply of 10,700 acre-feet annually, which is anticipated for out- <br />door residential use 20 years following project construction. This <br />amount was then adjusted to reflect smaller amounts of water that would <br />be used in early years of project operation. Derivation of the benefits <br />is shown below. <br /> <br />. <br /> <br />Investment <br />Construction costs (January 1973 prices) <br />Interest during construction (7 percent) <br />Total <br />Annual costs for lO,700 acre-feet of water <br />Investment (25-year period at 7 percent) <br />Operation, maintenance, and replacement costs <br />Power for pumping <br />Ruedi Reservoir storage charge <br />Total <br />Adjusted benefits for varying water supply <br /> <br />Summary of Benefits <br /> <br />$7,680,000 <br />8l0,000 <br />8,490,000 <br /> <br />728,500 <br />l25,300 <br />256,200 <br />l07,000 <br />l,2l7,000 <br />860,200 <br /> <br />Total benefits for the gravity pipeline plan are estimated at an av- <br />erage of $2,406,900 annually over a 100-year period as shown in the fol- <br />lowing table. The estimates of benefits made in the preceding discussions <br />have been adjusted to reflect loss of lands to agricultural use as a re- <br />sult of construction of proj ect facilities. <br /> <br />. <br /> <br />38 <br />