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<br />. 0'1870 <br /> <br />. <br /> <br />. <br /> <br />From flood damage data, pages 77 and 79, the estimated <br /> <br />annual benefits for channel improvements through Trinidad are <br /> <br />$22,000 and $9,000, respectively, for capacities of .50,000 and 30,000 <br /> <br />second-feet. In the first instance these are considered equal to the <br /> <br />elimination of damages resulting from floods of one to lOO year <br /> <br />frequency with an additional allowance of $4,800 for enhanoement of <br /> <br />land value in Trinidad. In the second instance they are considered <br /> <br />equal to the elimination of damages resulting from floods of one to <br /> <br />25 year frequency With an additional allowance of $l800 for en- <br /> <br />hancement of land val~e in Trinidad. No irrigation benefits are <br /> <br />estimated to accrue with this type .of development. <br /> <br />CONCLUSIONS <br /> <br />This project provides dual benefits of flood control and <br /> <br /> <br />irrigation. With costs allocated to irrigation to the extent of <br /> <br />its water supply benefits, participation in project costs for <br /> <br />each feature would be as follows: <br /> <br />Total construction cost <br />Irrigation allooation <br /> <br />$2,730,000 <br />456,000 <br /> <br />$2,274,000 <br /> <br />Remainder <br /> <br />Annual benefits from flood control elsewhere determined - $60,600 <br /> <br />Less annual cost for operation and <br />maintenance of reservoir <br /> <br />3,000 <br /> <br />Net annual flood control.benefit <br /> <br />$.57,600 <br /> <br />Capitalizing net benefits at 3i1-, the flood control ex- <br /> <br />penditure would be $l,650,OOO, or $624,000 less than the remainder <br /> <br />after allowing for irrigat ion b enefi ts. <br /> <br />83 <br /> <br />" ,- <br /> <br />