OCR Text |
Show Table 1.-Capacity and regulation of some representative reservoirs Usable capacity Annual regulation0 Reservoir and State Ratio to mean Acre-feeta Detention Acre-feet Ratio to annual periodb per year capacity flow Piney, Pa. 13,000 0.011 70,000 5.4 0.06 Great Falls, Tenn. 49,400 .021 204,000 4.1 .089 Ocoee No. 1, Tenn. 33,100 .035 204,000 3.6 .13 Claytor, Va. 100,000 .04 150,000 1.5 .06 Mascoma Lake, N. H. 7,744 .05 22,000 2.8 .14 Franklin D. Roosevelt, Wash. 5,072,000 .07 4,800,000 .95 .07 W. Fk. Bitterroot, Mont. 31,700 .14 26,000 .82 .12 Hiwassee, N. C. 1,376,000 .265 330,000 .90 .24 Green Mt., Colo. 146,900 .34 111,000 .75 .26 Gibraltar, Calif. 7,731 .39 4,300 .55 .21 Stillwater, N. Y. 106,000 .40 91,000 .86 .34 Sacandaga, N. Y. 762,300 .51 560,000 .75 .38 First & Second Con- necticut Lakes, N. H. 88,106 .60 62,000 .70 .42 Norris, Tenn. 2,281,000 .72 1,070,000 .47 .34 Shasta Lake, Calif. 4,377,000 .80 1,530,000 .35 .28 Lake Alamanor, Calif. 649,800 1.0 250,000 .38 .38 Salmon R. Canal Co., Idaho- 182,650 1.6 57,500 .31 .54 Henrys Lake, Idaho 79,351 2.1 20,600 .26 .54 Lake Mead, Ariz.-Nev. 27,207,000 2.1 d5,75O,OOO .21 .44 Lake Mead plus Lake Mohave 29,000,000 2.3 d6,500,000 .22 .51 Fort Phantom Hill, Tex. 69,500 2.3 11,900 .175 .40 Lake Kickapoo, Tex. 106,000 2.6 20,200 .19 .49 Elephant Butte, N. Mex. 2,185,000 2.6 d375,OOO .17 .45 Elephant Butte plus Caballo, N. Mex. 2,526,000 3.0 d470,000 .185 .55 Quabbin, Mass. 1,279,000 6.0 119,000 .09 .56 San Carlos, Ariz. 1,205,000 6.7 d117,000 .097 .65 Lake Henshaw, Calif. 194,320 21.8 8,170 .042 .91 aFrom W.S.P. 1360-A. bRatio of usable capacity to mean annual flow. cFor reservoirs with detention period greater than 0.1 year, regulation was computed from monthly changes in reservoir contents. Daily data were used for smaller reservoirs. including evaporation losses. |