. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. TflE FISITKRY OI' 'PI IK liOWER f'OI^OKADO RIVER 121 Havasu is a long iiiul nari-ow rcservuir hiiL has an irregular shurclinc; with many bays and coves. Due to the current persisting throughout its course it is better termed a run-of-the-river lake than a lake in the sense of Lake Mead. However, its expansions where it swells out into old valleys give it large, quiet wafer areas. The relative weights of its fluvial and lacustrine char
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. TflE FISITKRY OI' 'PI IK liOWER f'OI^OKADO RIVER 121 Havasu is a long iiiul nari-ow rcservuir hiiL has an irregular shurclinc; with many bays and coves. Due to the current persisting throughout its course it is better termed a run-of-the-river lake than a lake in the sense of Lake Mead. However, its expansions where it swells out into old valleys give it large, quiet wafer areas. The relative weights of its fluvial and lacustrine characferisties await further study. At full c-apaeity (elevation 4r)().r>4 feet) it has an area of ncres and stores 717,000 acre-feet of water. With the spillway gates closed, the depth of the lake at the dam is 7~^ feet; 25 feet with the gates oi) Fig. 53. Upstrea,m view of Parker Dam. Foundation for power house on left. Pliotograph by D. A. Clanton, Jan. 25, 1939. For efficient pumping into the Colorado River Aqueduct the water surface should be maintained between and feet. Therefore, under a contract between the Metropolitan Water District and the United States, the Federal Government pos- sesses only the limited right to regulate the top 10 feet of storage except with the per- mission of the District or in case of an emergency. While even this limited fluctuation might be harmful to fish at times, it can in no way be compared to the excessive fluctua- tion found in so many western reservoirs.•* However, for various reasons the elevation of Lake Havasu has dropped below feet several times since 1938, the lowest elevation being feet on June 25, 1942. Not until October 11, 1942 did it again reach feet and it has been above that stage since. In 1943 the regulation of the water surface was very favorable for fish. The reservoir rose from 441 feet in early January to 450 feet by the first of April. It maintained a level between 45
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