Hopeville Silo Bunker Entrance
The Northern area of the base, search the horizontal hallway.
Hopeville Missile Base Headquarters
Check under the desk of the northernmost room.
Ashton Silo Control Station
Look for a large door – locked by a computer just next to it – hack it and search for the bot inside – Southern side.
Search for a warhead when you are facing the narrowing canyon, its right before entering into the Caves of Abaddon. Set the warhead off and then look in the rubble.
There is a big opening into the sewers when you are climbing the “Third Street Municipal Building”. That opening leads you into a cave which has the eye bot in front, lying on the floor.