Assertion: lake's source | /r/AtLocation | public land
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Source sentences:
text: The electricity produced by the hydroelectric plants drawing their water from the Hetch Hetchy reservoir became the subject of controversy when it was reported by the San Francisco Bay Guardian that the city of San Francisco sold roughly 500 megawatts of power to PG&E, supposedly in violation of the Raker Act, which specifies that because the source of water and power was on public land, no private profit could be gained from such sales.