In Polygon’s The Last of Us “Tommy’s Dam” collectibles guide, we’ll show you the location of the 2 artifacts, 2 Firefly pendants, 1 Training Manual, and 2 comics.
“Tommy’s Dam” has two sections: Hydroelectric Dam and Ranch House, but you won’t see those names as you’re playing the game. You can find, select, and begin playing at any section from the Chapters option on the main menu. We’ll explain where and when each part begins and ends at the top of each section below.
Hydroelectric Dam starts in the fall as Joel and Ellie arrive in Jackson County. It ends when you arrive at a (the) ranch house after the drama at the hydroelectric plant, a lot of shooting, and a brief horse chase.
Foreign Element comic location
From the start of the chapter, you’ll follow a path until it ends at a cliff, and then climb down to another path by the river. Just before you pass under the bridge, look uphill to your right. There’s a rusty car lying against the rocks (it’s hard to spot because it looks like another rock). The Foreign Element comic is next to it.
Power Plant Map artifact location
Continue along the path until you reach the FEDRA checkpoint (there will be a bulldozer on your left and a concrete wall on your right). The Power Plant Map is in the guard shack on the opposite side of the checkpoint.
Smoke: Chemistry Training Manual location
After the reunion cutscene(s), you’ll be inside the power plant. After some walking and talking, you’ll follow Tommy deeper into the plant. Keep following him until you reach a control room. The Smoke: Chemistry Training Manual is on the far side of the room to the left of the guy sitting at the console. (There’s also a workbench in the room to the left.)
Ryan Oliverio Firefly pendant location
Continue following Tommy. After the lights are on, go down the stairs to the main floor. Instead of following Tommy, turn left and cross all the way back to the area under the control room. The Ryan Oliverio Firefly pendant is on a shelf in the room you find there.
Plant Schematics artifact location
Get back to Tommy and watch the conversation. After Joel and Tommy are done talking, you’ll have some shooting to do. Make your way forward across the main floor and up the stairs on the right side. The Plant Schematics are on the table in the room at the top.
The Ranch House section starts when you arrive at the eponymous ranch, and ends when you leave the ranch after a heart-wrenching argument and some more shooting.
Brent Pino Firefly pendant location
Inside the ranch house, head toward the back of the first floor along the righthand side. The Brent Pino Firefly pendant is on a desk in the last room (with a fireplace and a lone chair in the middle of the floor).
Zero Point comic location
Up the stairs, turn into the first bedroom on your left. The Zero Point comic is to the left by the window.