Gold Bolt Locations
The path behind the ship leads to a bolt crank. Inside at the end are some cracked rocks that can be blown up with the Bomb Glove on the right wall to reveal Gold Bolt #1.
Along the water works path to the Plumber, wall jump up to the ledge. At the top will be Gold Bolt #2.
Once you comeback with the O2 Mask (Pokitaru) and the Hydro-Pack (Hoven), follow the riverbank or turbo swim up the river into the tunnel. There are two ways to get Gold Bolt #3. Simply boost jump up from the boxes. If the boxes were destroyed, go around to the ladder in the large room. Climb it and some steps for Gold Bolt #3.
Gold Bolt #4 can be found on the other side of the ledge above after the escalator. This is in the area of the train, and there is a Sand Mouse near the Gold Bolt. ...