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<br />Less annual cost for operation and <br />maintenc.nce of' reservoir <br /> <br />3.000 <br />$52,600 <br /> <br /> <br />. <br /> <br />o~' 1869 <br /> <br />From flood damage data, pages 77 and 79, the estimated <br /> <br />annual benefits for channel improvements through 1'rinidad are <br /> <br />$22,000 and $9,000, respectively, for capacities of 50,000 and <br />30,000 second-feet. In the first instance these are considered <br /> <br />equal to the elimination of damages resulting from floods of from <br /> <br />one to lOO-year frequency with an additionsl allowance of $4,800 <br /> <br />for enhancement of land value in Trinidad. In the second instance <br /> <br />they are considered equal to the tilimination of damages resulting <br /> <br />from floods of from one to 25-year frequency with an additional <br /> <br />allowance of $1800 for enhancement of land value in Trinidad. No <br /> <br />irrigation benefits are estimated to accrue with this type of de- <br /> <br />velopment. <br /> <br />CONCLUSIONS <br /> <br />. <br /> <br />The project provides dual benefits of flood control and <br /> <br />irrigation. With costr; allocated to irrigation to the extent of <br /> <br />its water supply benefits, 0~rticipation in project costs for each <br /> <br />feature would be as fellows: <br /> <br />Remaindor <br /> <br />$2,781,000 <br />456.000 <br />$2,325,000 <br /> <br />Total construction cost <br />Irrigation allocation <br /> <br />Annual benefits frem flood control elsewhero determined - $55,600 <br /> <br />Net annual flood control benefit <br /> <br />Capitalizing net benefits at 3~%, the flood control ex- <br /> <br />penditure would be ~\1,235,000, or $1,090,000 less than the remainder <br /> <br />. <br /> <br />after allowing for irrigation benefits. <br /> <br />83 <br />