OCR Text |
Show site. These include Little Diamond, about k miles upstream from Hayes, and Monk's Hollow, about 3 miles upstream from Little Diamond. Both sites are on U. S. Forest Service land. The Little Diamond site would require a 215- foot- high and 3 » 000- foot- long dam to store the same amount of water as Hayes Reservoir. This reservoir would cause several adverse effects: ( l) A total of 61+ 5 acres of land would be inundated, and 30 additional acres would be required for road relocation. ( 2) The reservoir would inundate Palmyra and Diamond Campgrounds, which have 117 family units and had 55 » ^ 00 visitor days of use in 1971. ( 3) Fishery stream inundation would occur on 3> h miles of Diamond Fork ( Class III), 1.2 miles of Wanrodes Creek ( Class IV), and 0.6 mile of Little Diamond Creek ( not classified). { k) Annual drawdown would expose mudflats in the upper portion of the reservoir which would be visible from the reservoir and much of the relocated roads. A reservoir at the Little Diamond site would result in these beneficial impacts: ( l) The reservoir would cover 6U5 acres at normal water surface elevation and 220 acres at minimum water surface elevation which would provide fishing and recreation opportunities. ( 2) The storage capacity would reduce the surges in Diamond Fork because of peaking power operation of the power system and thus reduce the erosion and safety hazard that would exist under the proposed plan. At Monk's Hollow, a dam 310 feet high and 900 feet long would be required. Adverse effects at this site would include the following: ( l) Inundation of U75 acres at normal water surface and a loss of an additional 21 acres to 5- 7 miles of required road construction would occur. ( 2) Three Forks Campground, with 6 family units having 1,800 visitor days in 1971 » would be lost by inundation. ( 3) The reservoir would also inundate 3. U miles of Diamond Fork ( Class III), O. k mile of Sixth Water Creek ( Class III), 0.3 mile of Monk's Hollow Creek ( not classified), and 0.6 mile of Red Hollow Creek ( not classified), ( k) Visual impacts would result from the annual drawdown. Beneficial effects would include creation of a reservoir surface area of ^ 75 acres at normal water surface elevation, with potential for fishing and recreation, and elimination of the power surges in Diamond Fork below the Dyne Powerplant. 602 |