 Electricity from the dam 's powerhouse was originally sold pursuant to a fifty @-@ year contract , authorized by Congress in 1934 , which ran from 1937 to 1987 . In 1984 , Congress passed a new statute which set power allocations from the dam from 1987 to 2017 . The powerhouse was run under the original authorization by the Los Angeles Department of Water and Power and Southern California Edison ; in 1987 , the Bureau of Reclamation assumed control . In 2011 , Congress enacted legislation extending the current contracts until 2067 , after setting aside 5 % of Hoover Dam 's power for sale to Native American tribes , electric cooperatives , and other entities . The new arrangement will begin in 2017 . The Bureau of Reclamation reports that the energy generated is allocated as follows : 
 Electricity from the dam <a href='null_genetive' title='1'><mark>'s</mark></a>powerhouse was originally sold pursuant to a fifty @-@ year contract , authorized by Congress in 1934 , which ran from 1937 to 1987 . In 1984 , Congress passed a new statute which set power allocations from the dam from 1987 to 2017 . The powerhouse was run under the original authorization by the Los Angeles Department of Water and Power and Southern California Edison ; in 1987 , the Bureau of Reclamation assumed control . In 2011 , Congress enacted legislation extending the current contracts until 2067 , after setting aside 5 % of Hoover Dam <a href='null_genetive' title='2'><mark>'s</mark></a>power for sale to Native American tribes , electric cooperatives , and other entities . The new arrangement will begin in 2017 . The Bureau of Reclamation <a href='uninflect' title='3'><mark>reports</mark></a> that the energy generated is allocated as <a href='uninflect' title='4'><mark>follows</mark></a> : 
Electricity from the dam  powerhouse was originally sold pursuant to a fifty @-@ year contract , authorized by Congress in 1934 , which ran from 1937 to 1987 . In 1984 , Congress passed a new statute which set power allocations from the dam from 1987 to 2017 . The powerhouse was run under da original authorization by the Los Angeles Department of Water and Power and Southern cali Edison ; in 1987 , tdaBureau of Reclamation assumed control . In 2011 , Congress enacted legislation extending the current contracts until 2067 , after setting aside 5 % of Hoover Dam  power fa sale to Native American tribes , electric cooperatives , and other entities . The new arrangement will begin in 2017 . The Bureau of Reclamation report dat the energy generated is allocated as follow :