Posted September 24, 2013. I know you can get too it trough one of the beaches somewhere. I remember running from the police and dropping down a hole and it lead to a tunnel which lead to a train tunnel and I landed on a train carriage at the last second, it carried me away from the police xD. the map however says the transit starts somewhere

Where is the sewer tunnel in GTA 5? Sewer Tunnel A short distance from the Casino there’s a large storm drain. Near the end of the storm drain is a side exit that goes underground. Head into the underground tunnel. A short distance into the tunnel you will spot a metal grate on the right hand side.

The Diamond Casino & Resort is a content update for Grand Theft Auto Online, released on July 23rd, 2019. The update introduces The Diamond Casino & Resort, a newly-opened business located in East Vinewood where the original Vinewood Casino was found. The casino features an exclusive penthouse, casino floor, and garage storage. The Diamond program was introduced primarily to reward players for Tunnel Boring Machine is an optional prep mission featured in Grand Theft Auto Online as part of the The Diamond Casino Heist update. It is a freeroam mission needed to progress The Diamond Casino Heist. This mission can only be played if the player sent a picture of the sewer tunnel to Lester . 345 264 115 354 116 290 260 182

gta 5 casino sewer tunnel location