4. At Niagara Falls in 1894 A water discharge of 168,000 cubic feet per second falling 212 feet would yield 2,250,000 horsepower.

5. Hydropower Efficiencies of up to 90% 10% of U.S. electricity is based on hydropower Negative environmental impacts include: necessity of large reservoirs, displacement of people, influence on fish migration, methane production, alteration of river temperatures.

21. Buffalo Population and Rank YearPopulationRank 18308,66827 1870117,71411 1910423,71510 1950580,13215 2000292,64857