 Hoover Dam impounds Lake Mead , the largest reservoir in the United States by volume . The dam is located near Boulder City , Nevada , a municipality originally constructed for workers on the construction project , about 30 mi ( 48 km ) southeast of Las Vegas , Nevada . The dam 's generators provide power for public and private utilities in Nevada , Arizona , and California . Hoover Dam is a major tourist attraction ; nearly a million people tour the dam each year . The heavily travelled U.S. 93 ran along the dam 's crest until October 2010 , when the Hoover Dam Bypass opened . 
 Hoover Dam <a href='uninflect' title='1'><mark>impounds</mark></a> Lake Mead , the largest reservoir in the United States by volume . The dam is located near Boulder City , Nevada , a municipality originally constructed for workers on the construction project , about 30 mi ( 48 km ) southeast of Las Vegas , Nevada . The dam <a href='null_genetive' title='2'><mark>'s</mark></a>generators provide power for public and private utilities in Nevada , Arizona , and California . Hoover Dam is a major tourist attraction ; nearly a million people tour the dam each year . The heavily travelled U.S. 93 ran along the dam <a href='null_genetive' title='3'><mark>'s</mark></a>crest until October 2010 , when the Hoover Dam Bypass opened . 
Hoover Dam impound Lake Mead , the largest reservoir in da United States by volume . The dam is located near Boulder City , Nevada , a municipality originally constructed for workers on the construction project , about 30 mi ( 48 km ) southeast of Las Vegas , Nevada . Tdadam  generators provide power for public and private utilities in Nevada , Arizona , and California . Hoover Dam is a major tourist attraction ; nearly a million people tour the dam each year . Thdaeavily travelled U.S. 93 ran along the dam  crest until October 2010 , when the Hoover Dam Bypass opened .