Skip to content
HUNDOPATH
Sign in
0%, 0 of 430

All areas

Grouped by category

Current area: Tommy's Dam

0 of 27 in this area

On this device

The Last of Us Part I: The Last of Us Part I 100% Completion Guide

Next up

Tommy's Dam

A river walk to the dam, a tour of the plant, and a ride out to a ranch.

The chapter runs from a trail to a ranch, by way of a puzzle at the dam and a tour of the plant. Two trophies here are single moments, Left Hanging and Who's A Good Boy?, so read each row before you reach it. Bring one whole shiv for the door at the top of the dam stairs, and keep a Binding and a Blade for the Hatchet's melee upgrade, and a second pair if the Machete row is open. Open the plant's workbench as soon as you reach it. A missed pickup can be collected after the credits with Chapter Select.

El DiabloWeapon
Location
Tommy's Dam · Hydroelectric Dam – Follow the path ahead to the wrecked jeep. The gun lies by the skeleton at the open driver's door. If it isn't there, look on the seat.
Requires
Summary
A handgun left with a body beside a wrecked jeep.
Sources
Report an issue
Trail, jeep, drop to the riverQuest step
Location
Tommy's Dam · Hydroelectric Dam – Walk the path to the wrecked jeep, then drop off the road on the left and follow the river towards the bridge.
Requires
Summary
The way on leaves the road for a path along the river.
Sources
Report an issue
Comic: Foreign ElementCollectible
Location
Tommy's Dam · Hydroelectric Dam – Before you pass under the bridge, climb the muddy slope on the right to an overturned car with a body. The comic is on the ground beside it. If no prompt shows, stand right on top of it. Turn it over when you read it.
Requires
Summary
A comic beside a wreck on the slope above the river.
Sources
Report an issue
Shiv Door: DamOther
Location
Tommy's Dam · Hydroelectric Dam – Return to the river and follow it to the dam, then climb the three flights of metal stairs. The blue door is on your right at the top. It takes one whole shiv: a part-used one won't open it. Take everything inside.
Requires
Summary
A locked supply room at the top of the dam stairs.
Sources
Report an issue
Before you go into the water

Take Foreign Element and open the shiv door first. Once the way across is open, walk past Ellie's raised hand for Left Hanging.

Dam puzzle with EllieQuest step
Location
Tommy's Dam · Hydroelectric Dam – Turn the valve at the top of the stairs for the first gate, then jump in and dive into the flooded building to free the wooden pallet from its roof. Push it under Ellie, float her over, and wait for her to raise the second gate. Read the Left Hanging row before you cross.
Requires
Summary
Two gates block the way across, and it takes both of you to open them.
Sources
Report an issue
Left HangingAchievement
Location
Tommy's Dam · Hydroelectric Dam – Cross the raised gate towards Ellie, who holds up her hand as a prompt shows. Do not take it: keep walking past her until she complains and the trophy pops. A high five spends the chance, so restart the checkpoint if it happens, or, after the credits, replay the sub-chapter from Chapter Select. Once it pops, you can restart the checkpoint and give her the high five.
Requires
Summary
A one-moment trophy for refusing Ellie's high five, just past the gate.
Trophies
  • Achievement · SteamLeft Hanging
  • Bronze · PlayStationLeft Hanging
Sources
Report an issue
Conversation: Child's GraveOther
Location
Tommy's Dam · Hydroelectric Dam – From where Ellie stood, drop off the walkway to the left, pass the small campsite and vault the log. Wait at the grave for Ellie, then take the prompt and hear it out.
Requires
Summary
A small grave with a teddy bear, off the main path.
Sources
Report an issue
Artefact: Power Plant MapCollectible
Location
Tommy's Dam · Hydroelectric Dam – Climb back to the walkway, go up the steps and duck under the tree (you're past this if you took the plant by the bulldozer). Past the yellow bulldozer, the small brick guardhouse stands on your left with the gate on your right. The map is on the wall inside.
Requires
Summary
A map pinned up in the guardhouse by the gate.
Sources
Report an issue
Before you touch the plant gate

Finish the talk at the grave and take the Power Plant Map first.

Conversation: Horse RidingHidden spoiler – activate to revealOtherMinor spoiler
Report an issue
Conversation: Tommy's BagHidden spoiler – activate to revealOtherMinor spoiler
Report an issue
Supplements: End Room ChairHidden spoiler – activate to revealUpgradeMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Follow Tommy up the steps, but turn left instead of going outside. They're on the armchair in the room at the end.
Requires
Summary
Pills in a dead-end room off the stairs.
Sources
Report an issue
Conversation: Dam SentryHidden spoiler – activate to revealOtherMinor spoiler
Report an issue
Who's A Good Boy?Hidden spoiler – activate to revealAchievementMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Follow Tommy to the far side of the dam, where Buckley sits chewing a ball just before the building. Walk up to him and take the prompt. Pet him before you follow Tommy in. If you miss him, Chapter Select will bring him back after the credits.
Requires
Summary
A one-moment trophy for petting Buckley the dog.
Trophies
  • Achievement · SteamWho's A Good Boy?
  • Bronze · PlayStationWho's A Good Boy?
Sources
Report an issue
Before you go into the far building

Talk to the woman on watch and pet the dog first.

Follow Tommy into the control roomHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Go in behind Tommy. Two workers stand at the big central table, and the Plant Schematics lie on it. They won't pick up yet, so leave them for now.
Requires
Summary
The far building holds the plant's control room.
Sources
Report an issue
Training Manual: Smoke ChemistryUpgrade
Location
Tommy's Dam · Hydroelectric Dam – Walk to the left of the central table. The manual is on the overturned locker, left of the man at the control panel.
Requires
Summary
A manual lying on a fallen locker in the control room.
Sources
Report an issue
Workbench: Dam Control RoomArea
Location
Tommy's Dam · Hydroelectric Dam – It stands right beside the manual, left of the control panels. Open it now to register it, even with nothing to spend, and finish the Revolver here if Combat Ready is still open. You may not get a second chance at this bench.
Requires
Summary
The plant's only workbench. Open it as soon as you get here.
Sources
Report an issue
Firefly Pendant: Ryan OliverioCollectible
Location
Tommy's Dam · Hydroelectric Dam – Go down the stairs by the workbench to the storage room directly below. The pendant is on the floor between two large machines. It may instead be on the bottom shelf of a cabinet.
Requires
Summary
One of the 30 pendants, in the storage room under the control room.
Sources
Report an issue
Before you open the door by Tommy

Open the workbench, and take the Smoke Chemistry manual and the Ryan Oliverio pendant first. The talk with the woman on watch and Buckley should be done too. The scene behind this door starts an attack, and the workbench can't be counted on after it: it may be destroyed.

Argument with Tommy, the attackHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Cross the turbine floor to the door at the back, where Tommy waits, and open it. When the scene ends the fight starts, so craft Health Kits and a melee upgrade first if you can.
Requires
Summary
Joel and Tommy talk in private until bandits hit the plant.
Sources
Report an issue
Fight back up to the control roomHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Stay in cover, picking off the far ones first and using the shotgun on any who get close. Work back through the plant to the control room until no bandit is left inside.
Requires
Summary
Bandits fill the building on your way back through it.
Sources
Report an issue
Artefact: Plant SchematicsHidden spoiler – activate to revealCollectibleMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – With the room clear, go to the big central table where the workers stood and take them. The prompt only shows now.
Requires
Summary
The plans on the control room table, which can only be taken after the fight.
Sources
Report an issue
Before you go out to the bridge

Take the Plant Schematics from the table first.

Melee upgrade broken 5 of 5: HatchetHidden spoiler – activate to revealAchievementMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Leave the control room by the door on the right and look for the Hatchet on your way out, leaning against a wooden box or a forklift. Upgrade it on the spot from the crafting menu with a Binding and a Blade, then use it on the bandits on the bridge until the upgrade breaks. If you can't find it, Hatchets turn up in later chapters too.
Requires
Summary
The Hatchet's break, with the one that lies on the way out of the plant.
Sources
Report an issue
Cross the bridge to Ellie and MariaHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Hydroelectric Dam – Stay crouched on the bridge's lower path and use the shotgun or melee on anyone left, once you're close. Enter the building on the far side and keep your distance from its shotgun carriers. When it's clear, walk up to Ellie and Maria to start the scene.
Requires
Summary
More bandits hold the bridge and the building on the far side.
Sources
Report an issue
Ride to the ranch, beat the first ambushHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Ranch House – When the scenes end, ride along the trail until enemies block it. Keep to the right, stay in cover and watch for any circling behind you. Once it's clear, search the small building on the right, ride on to the ranch, tie up the horse and go inside.
Requires
Summary
Joel rides out with Tommy, and bandits block the trail.
Sources
Report an issue
Supplements: Ranch SinkHidden spoiler – activate to revealUpgradeMinor spoiler
Location
Tommy's Dam · Ranch House – Through the front door, turn left into the first room. They're on the sink.
Requires
Summary
Pills in a small bathroom by the front door.
Sources
Report an issue
Firefly Pendant: Brent PinoHidden spoiler – activate to revealCollectibleMinor spoiler
Location
Tommy's Dam · Ranch House – On the ground floor, go to the back right room, the one with the fireplace and a single chair. The pendant is on the small cabinet with a lamp, by the wall between the doors.
Requires
Summary
One of the 30 pendants, in the back room of the ranch house.
Sources
Report an issue
Comic: Zero PointHidden spoiler – activate to revealCollectibleMinor spoiler
Report an issue
Before the door at the end of the hall

Take the Brent Pino pendant and Zero Point first. If the Machete row is open, take the Binding and Blade from the upstairs rooms too, and keep them for its upgrade.

The door at the end of the upstairs hallHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Ranch House – From the bedroom, walk to the end of the upstairs hall and go through the half-open door, then watch the scene.
Requires
Summary
A scene plays behind the half-open door, and bandits arrive after it.
Sources
Report an issue
Hold the stairs, ride offHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Tommy's Dam · Ranch House – Hold the top of the stairs and use the shotgun on them as they climb. If the Machete row is still open, take the Machete from the bandit upstairs, craft the upgrade on to it with a Binding and a Blade, and break it on the others. When they're dead, go back to the horses and ride out, which ends the chapter.
Requires
Summary
Bandits come up through the house.
Sources
Report an issue
Build Em Up, Break Em DownHidden spoiler – activate to revealAchievementMinor spoiler
Location
Tommy's Dam · Ranch House – It pops on your fifth break. If the tracker is still short, finish it after the credits with Encounter Select: the Ranch House fight for a Machete, the Bus Depot tunnel for a Hatchet, and the Pittsburgh hotel rooms for the other three.
Requires
Summary
Earned by breaking an upgrade on all five melee weapons.
Trophies
  • Achievement · SteamBuild Em Up, Break Em Down
  • Silver · PlayStationBuild Em Up, Break Em Down
Sources
Report an issue

About this guide

One run of the story and one of Left Behind, on any difficulty: no trophy depends on it. The story is one way, so take each pickup before you move on. After the credits, Chapter Select clears anything its menu shows as short, but take the Workbench Tools on the first run: the menu doesn't show them, and one taken on a replay may not count.

Last verified: Nov 7, 2026 · Patch Latest patch (PS5, PC on Steam and Epic), with Left Behind · 0 community corrections shipped

Unofficial fan guide. Not affiliated with the publisher.