The Hoover Dam power plant 02 is a location within the Hoover Dam in 2281. During the final quest, this power plant is where the New California Republic and Caesar's Legion standoff in the Second Battle of Hoover Dam.
This is the second of four power plant sections, alongside plant 01, plant 03, and plant 04. All of the power plant sections have similar layouts, including a large open area in the middle with two giant turbines, with a middle and top tier of catwalks, and work areas along the walls and the floor forming the bottom of three tiers. Each tier has at least two sets of stairs connecting to the next tier up or down.
There is a water testing site on the bottom floor and by the exit to the lower dam exterior on the middle tier. On the opposite side of the plant, there are several lab stations, tables, chairs, and coffee cups. There are two drinking fountains that have an "out of order sign" in front of them, next to a wrench, a toolbox, and several traffic cones.
On the second level, there is a Hard locked terminal that impacts Karma if hacked. It leads to power plant 01, which is already accessible by way of the door directly below it. This power plant houses two turbines, numbers N3 and N4, of which N3 is operational.
The Hoover Dam power plant 02 appears only in Fallout: New Vegas.
Behind the scenes
The Hoover Dam power plants are based on the power plants of the real world Hoover Dam. The equivalents in-game are nearly identical, from the appearance of the turbines themselves to the layout of the room's structure, equipment, and catwalks. In the real world, there are in total 17 main turbines and in-game there are only eight.