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Subject:  Re: Maine's renewable portfolio standard Date:  10/8/2012  5:13 PM
Author:  waterfell Number:  38279 of 84065

Here is a report from the Electric Power Research Institute (EPRI) on potential hydroelectric capacity additions in the US.

From the executive summary:
The potential for waterpower expansion—at existing hydroelectric facilities, at dams without powerhouses, at new small- and low-power developments, and from the emerging next generation of waterpower technologies—is substantial, as presented and discussed herein. The potential increase in generation capacity is conservatively estimated as 23,000 MW by 2025. This includes:

2,700 MW of new small and low power conventional hydropower
(< 30 MW installed capacity);

2,300 MW capacity gains at existing conventional hydropower;

5,000 MW of new conventional hydropower at existing non-powered dams;

10,000 MW from ocean wave energy technologies; and

3,000 MW from hydrokinetic technologies.

These estimates could be significantly increased if economic incentives and regulatory processing for the waterpower technology industry are enhanced. The overall resource potential, based on resource assessments conducted by the U.S. Department of Energy (DOE), EPRI and industry is estimated to range from 85,000 to 95,000 MW.


The ocean wave and hydrokinetic technologies do not fall under the usual definition of hydroelectric power, but there are still untapped resources available from the conventional dam systems.

- Pete
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