The Silo

The Silo is a quest in the Fallout: New Vegas add-on Lonesome Road.

Quick walkthrough
Now that you have made your way to the Hopeville Missile Silo, you must find a way to open the blast doors in order to make your way to the Lonesome Road. Navigate the missile silo to find a familiar companion who will assist you in operating the blast door terminal.

Detailed walkthrough
Approach the bunker from the Pass to Canyon Wreckage. At about the halfway point, a large pipe will allow you to climb a hill to the southwest, giving you access to a duffel bag. Northwest from the pipe is the Hopeville Silo Bunker Entrance.

Entering the bunker takes you to a sewer access tunnel that leads straight into a wrecked room. Halfway down the tunnel is the graffiti "You can go home Courier!" and near the door to the next room the graffiti "Lonesome Road" is painted.

In the first room, there are locked doors to your left and to your left (north) and right (south). In the middle of the room is a control panel that you need to activate to proceed north into the silo, but it is "encrypted beyond your ability to hack." The south door has an unlocked terminal next to it that unlocks it.

Walk through the south door and follow the path around and to the left. The path takes you to a maintenance area. A shelf on the north wall has a breathing mask and an arc welder, among other ammo and gear.

Inside you will find several robot pods and another terminal. Upon operation, you can release a robot, this is where you meet the ED-E. After talking to ED-E and recruting him as a companion, ED-E then proceeds to tell you that he can disrupt terminals with small satellite like dishes on them. Bring ED-E back to the console in the main room and he will proceed to return power to the Silo Door Control Terminal. Throw the switch on the console and watch the doors open as you power up the silo, revealing 2 ED-E copies reparing what looks like a missile.

Now the task is to get to the top floor, where you can use ED-E to unlock the Hopeville Silo Mainframe controls. Throw the switch and open the Silo's exterior doors. Upon opening them, several turrets and Sentry bot will attack you. After dealing with the turrets and sentry bots, follow the quest marker to a door that leads to Hopeville and finish the quest.