OCR Text |
Show SUMMARY (Continued) 24 million acres will receive structural land treatment, and management treatment for both production and protection. The effect of each alternative program can be shown by comparing installation cost of the erosion, flood and sediment prevention and the water yield improvement programs. For this portion of the produc- tion and protection program, total installation cost for the Framework Plan for 1966 to 2020 is $127,040,000. The total program costs for land management summarized in Tables 9 and 11 including protection and production programs will have a total installation cost from 1966 to 2020 of $431 million. Average per year expenditures of funds for installation and operation, maintenance and replacement for 1966 to 2020 are $24.4 million. If no additional watershed land treatment or flood protection pro- grams are initiated after 1965 annual damages will increase from the present $8.7 million to $25.6 million by 2020 assuming Framework Plan level of development. The "Going Program" based on 1964-69 level of expenditures would accomplish about 78 percent of the Framework plan program. The "OBERS as Published" projected level of development will require about 40 percent of the expenditures of the Framework Plan; many of present problems relating to the watershed use will be corrected by reducing present grazing use on range and forest land by nearly one-half and present irrigated land acreage will be reduced about 71,000 acres. The "States1 alternative plan to the Framework Plan (6.5 million acre-feet)" is basically transfer of types of use within and between States; the watershed program is essentially the same as the Framework Plan. "States' alternative at the 8.16 million acre-feet level of development" results in minimal, localized amounts of additional pro- tection associated with increased production activity. For the "States* alternative - water available at site" level, an optimum production and protection program is proposed resulting in a 5 percent increase in program costs primarily for intensified management. Upstream watershed management treatment programs will reduce the man-created erosion and sediment production and associated damage by over 40 to 60 percent. Present sediment yields will be reduced 8 per- cent or 2,764 acre-feet per year by 2020. The remaining damages are largely geologic in nature and generally not economically susceptible to treatment. Flood and sediment damage resulting from upstream watershed problems will be reduced about 30 to 50 percent. Multipurpose reservoirs built on the stream system will trap sediment and reduce sediment con- tribution to many downstream areas. The full watershed treatment program will enhance and help to main- tain the environment and provide for sustained use of the natural resources consistent with protection and enhancement of the land. iii |