01/22/2013 05:02 pm ET

New York City's Newest Power Source Could Be Its Sewers And Reservoirs

More than a billion gallons of water travel through New York State every day, starting upstate and journeying down to the city and the sea, and driven almost entirely by gravity alone. The city's watershed includes 19 reservoirs, three lakes, 7,000 miles of water pipes, tunnels and aqueducts, and 7,400 miles of sewer lines -- and perhaps many megawatts of untapped energy.

Through Thursday, the city Department of Environmental Protection (DEP) is collecting proposals from consultants interested in assessing the hydroelectric energy pent up in the city's water system. Legislation passed by the City Council last spring directed the agency to conduct a study of hydropower possibilities.

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