The Hoover Dam Key can only be obtained during the quest You'll Know It When It Happens or Arizona Killer. It is obtained from either President Kimble or the NCR Engineer who attempts to assassinate President Kimble.
Hoover Dam is on the Eastern side of the map, North East of NoVac.
Hoover dam
the hoover dam
Hoover Dam is on the Colorado River, southeast of Las Vegas.
Hoover dam was built to supply electrical power to Las Vegas .
You cannot reach that location until the last mission, the final battle for Hoover Dam. You will fight across the dam, to the Legate's camp.
It is a very large dam in Nevada outside of Las Vegas.
45 minutes
45 minutes
Las Vegas, NV and L.A., CA both get e- from the Hoover Dam
35 miles
32 miles
nevada power, not hoover dam