2) Estimate the number of powerboats operating on Lake Mead, the reservoir above the Hoover Dam, and assuming an average of 100 horsepower per boat, estimate the total power output of all these boats. Is it at all comparable to Hoover Dam's approximately 2 GW of electric power output? If it is, then the indirect environmental impact of this dam may be comparable to that of a fossil-fueled plant with the same output! You might start with the National Park Service's Environmental Impact Statement for its Lake Management Plan for Lake Mead