The flood and sediment reduction benefits of this program will vary according to which reservoirs are constructed. Their average annual value will be approximately as follows: With Santa Rosa Reservoir constructed and Gibraltar Reservoir enlarged, $48,400. With Santa Rosa and Cachuma Reservoirs constructed and Gibraltar Reservoir unchanged, $52,700. In addition to the flood-control benefits, this program will provide benefits in the form of reduced fire-suppression cost of $19,600 annually, and in the form of increased farm income, of $213,600 annually. Total average annual benefits will thus be $281,600, or $285,000, depending upon which reservoirs are built. The average annual cost of the program is approximately $131,000. The average annual Federal cost is approximately $38,300. Actual costs, average annual costs, and average annual benefits of the two programs planned are given in table 1. 97226-44. -2 TABLE 1.-Costs, direct evaluated benefits, and benefits per dollar of cost for alternative U. S. Department of Agriculture programs, Santa Ynez watershed Plan 1 with Cachuma Dam? onstructed; Gibraltar Dam unchanged: Forest land 3. 241, 040 Farm land. 241, 040 8,436 21, 791 1,997 21, 791 Structural measures. 1,997 30, 227 70 320 17, 536 177, 425 17,856 3, 520 180, 945 6, 333 776 1, 258 2, 034 390 7, 109 30, 227 17,926 8, 367 Total. 420, 462 3,520 423, 982 14, 839 22, 111 776 18, 794 41, 681 37,726 56, 520 Plan 1 with Cachuma Dam constructed; Gibraltar Dam enlarged: Plan 2 with Santa Rosa Dam constructed; Gibraltar Dam enlarged: Plan 2 with Santa Rosa and Cachuma Dams constructed; Gibraltar Dam 1 To obtain the average annual equivalent of values which occur at other than uniform annual intervals, costs due or benefits accruing each year are discounted to the present, added and multiplied by the discount rate. The rate used throughout was 31⁄2 percent. 2 Juncal Reservoir is included in all calculations for Gilbraltar Reservoir. 3 Cost of forest land program for entire watershed is compared with benefits of sedimentation prevention in individual drainage areas. TABLE 1.-Costs, direct evaluated benefits, and benefits per dollar of cost for alternative U. S. Department of Agriculture programs, Santa Ynez watershed-Continued Plan 2 with Santa Rosa and Cachuma Dams constructed; Gibraltar Dam unchanged: 1 To obtain the average annual equivalent of values which occur at other than uniform annual intervals, costs due or benefits accruing each year are discounted to the present, added and multiplied by the discount rate. The rate used throughout was 31⁄2 percent. 2 Juncal Reservoir is included in all calculations for Gibraltar Reservoir. Cost of forest land program for entire watershed is compared with benefits of sedimentation prevention in individual drainage areas. |