BP Statistical Review 2008 - Provides 11 years of data for 65 countries around the world detailing the number of oil equivalent tonnes each of these countries replaces with hydroelectric power.

Potential Hydroelectric Development at Existing Federal Facilities (May '07) - Found there was 1,283MW of potential hydroelectric capacity in the U.S. on unused land owned by the government, which could be developed to power 1 million households.

National Hydropower Association's 2007 Annual Report -

DOE's Water Energy Resources of the United States (April '04) - Estimates potential U.S. hydropower capacity at nearly 300GW (previous estimates were between 70GW by FERC and 580GW by the Army Corps of Engineers). Breaks down U.S. into 20 regions with details on existing capacity and undeveloped capacity for high power and low power (high head and low head) in each region.

China Society for Hydropower - Future of China's Hydropower ('04) - China's water resources provide a theoretical hydroelectric capacity of 689GW, of which 402GW is developable.

Idaho National Lab - Estimation of Economic Parameters of U.S. Hydropower Resources (June '03) - Study examined all potential hydropower sites in the U.S. and found 965 undeveloped sites (17,369MW potential capacity) with an average development cost of $2,700/kW (in 2002 dollars). It found 1,026 dams without power (20,749MW) with an average cost of $1,200/kW and 164 dams with power (4,917MW) at a cost of $700/kW. It further breaks these sites down by development costs, enabling development of those sites that can be brought online at the least cost.