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~ ~ 00 -' -.' ." 71 '. ~I'! << ~.,'. Mood NoMno' RoO'.a"dnM,o G'Oo"Conyan NotoonolPof' ,- '- " '''''"''''''.'' ~(' ("'i~A~, .,p1-/" Wafer is released from lake Mead through similar sels of diversion works in both walls 01 Block Canyon. The waler. drawn through the intake lowers, flows through piPS5 called penstocks 10 the powerplonts. The penstocks also con be used 10 dischorge waler directly from the reservoir 10 the river below the dam. The spillways were lested in 1941 and no! used again until the record high flows 01 1983. r t'l~' 'l.'.'~...::t" .', i.., k" '\, ",.. ~. ':Uill"~ ."- ~'':'''':~.~ ~. ., LO~ITIJ()tNAlSECTION \. T~""ol \ IU9 Physical Data The Dam It is Its crest is At top it is At bottom it is 726.4 feet or 221,28 meters high 1,244 feet or 379.2 meters long 45 feet or 13.7 meters thick 660 feet or 201.2 meters thick It contains 31/4 million cubic yards or 21/1 million cubic meters of concrete. The Reservoir Lake Mead when full is 110 miles or 177 kilometers long and has on 822-mile or 1323-kilomeler shoreline. Its capacity, including dead storage, is 28,537,000 acre-feet or 35,200,000,000 cubic meters. Maximum depth 500 feet or 152 meters Covers 157,900 acres or 63,900 hectares All figures are for the reservoir filled to the top of the spillway gates in the raised position - elevation 1221.4 feet or 372.28 meters. The Powerplant The 17 large generators are being uprated. With the completion of two uprated units in 1987, the powerplant had a nameplate capacity of 1,429,CXX) kilowatts. The uprating program being funded by non-Federal entities is scheduled to have all 17 units complete by 1992. As the Nation's principal conservation agency, the Deportment of the Interior has responsibility for most of our notionally owned public lands and natural resources. This includes fostering the wisest use of our land and water resources, protecting our fish and wildlife, preserving the environmental and cultural values of our national parks and historical places, and providing for the enjoyment of life through outdoor recreation. The Department assesses our energy and mineral resources and works to assure that their development is in the best interests of all our people. The Department also has a maior responsibility for American Indian reservation communities and for people who live in Island Territories under U.S. administration. ..u.s. Government Printing OJ/ice 1987-580-026 , ! I , ~~ I i I ~ ~ I I ,1 ~ ~ I