GTA Online: All Manhole Key Spawn Locations & Sewer Blueprint/Map

by enricofairme · Published July 17, 2026 4:41 PM · Updated July 17, 2026 4:42 PM

In GTA Online during The Kortz Center Heist players can unlock the Sewer Entry Point. To use this point players must first unlock it and then find a special Manhole Key tool to use it. This tool spawns randomly around the the center in one of five possible locations. If you are looking to find it easily, you’ve come to the right place. Below I walk you through all the Manhole Key spawn locations in GTA Online and where to find the Sewer Blueprint.

Manhole Key Spawn Locations Map

The five Kortz Center Heist Manhole Key spawn locations highlighted on the model in GTA Online. — The five Manhole Key spawn locations highlighted on the model.

The Manhole Key changes locations every time you run the heist, spawning randomly in one of five possible spots. Check the map above for a quick visual layout, and read below for the exact details on each location.

When you visit these spots, keep your eyes peeled for construction gear like toolboxes, ladders, or scaffolding. Those props mark the exact search areas. Best of all, if the key is actually at that location, a key icon will pop up directly on your mini-map when you get close.

Manhole Key 1 Spawn Location

Manhole Key spawn location near the Hedge Maze stairs. — There is a spawn location near the Hedge Maze staircase.

There is a spawn location between the Parking lot and Hedge Maze. Look for the staircase leading up. At the base of the staircase there are pylons around some construction material. Look on the construction material for the key.

Manhole Key 2 Spawn Location

The Kortz Heist Manhole Key Spawn location along the south side of the Kortz Center in GTA Online. — Look for this ladder on the southside of the Kortz Center.

Along the south side of the Kortz Center you will find a ladder and a toolbox. This is one spawn location. In the screenshot above you can see the manhole key icon on my mini-map.

Manhole Key 3 Spawn Location

The Kortz Heist Manhole Key Spawn location near the Staff Entrance staircase leading to the Bell Building roof. — There is a possible spawn here by the stairs leading to the Bell Building roof.

There is a Manhole Key spawn near the Staff Entrance Entry Point. When facing the doors turn to the right. You will see a carpentry table at the base of the stairs. The key can spawn here.

Manhole Key 4 Spawn Location

The Kortz Heist Manhole Key Spawn location on eastside of the Low Rotunda building in GTA Online. — Look for a ladder and tooblox on the outside of the Low Rotunda.

If you head to the east exterior of the Low Rotunda you will find a ladder and toolbox in the corner. This is a possible spawn location for the key.

Manhole Key 5 Spawn Location

The Kortz Heist Manhole Key Spawn location on eastside of the Moseley Building building in GTA Online. — Look for a carpenter’s bench on the eastside of the Moseley Building.

On the eastside of the Moseley Building you will find a carpenter’s bench, a sign, and a step-ladder. This is a possible spawn location of the key.

One of these locations listed above will have the key at it once. Once you’ve found which one you need to pick it up. Doing this makes it usable and allows you to use the Sewer Entry Point.

How to Get the Sewer Blueprint/Map

Another item you can grab to make getting through the Sewer easier is the Sewer Blueprint/Map. This item can be acquired during the Hazmat Suit Infiltration Gear mission.

The Sewer Blueprint/Map icon and location at the Kortz Center in GTA Online. — Acquiring the Sewer Blueprint/Map.

As you are doing the Hazmat Suit mission you will get a second objective. This objective will be a camera icon on your map. Go camera location and clear out the enemies. Walk over to the blueprints/map. Take a photo of it with your camera then send it to Raf.

Unlocking the map makes it easier to navigate the Sewer when you use that Entry Point. The map will flash, showing you where to go to get through the maze like location.

Did we do a good job of helping you find the Manhole Key and Sewer Blueprint/Map? Let us know in the comments below.