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Tilly Foster Iron Mine, aka Deep Flooded Mine is a shore accessible fresh water dive site, located at Old mine road, Brewster, NY. This dive site has an average rating of 3.00 out of 5 from 1 scuba divers. The maximum depth is over 150ft/46m.

Two miles west of the village of Brewster along Route 6, It was 600 feet (180 meters) deep.

From 1887 to 1889, the mine was made into an open pit, at the time the largest man-made pit. In 1895, there was a major collapse that killed 13 miners. After the collapse it was flooded by a reservoir nearby. It was used by soldiers in World War II to test their diving equipment. A collection of minerals and artifacts from the mine is at the Southeast Museum in Brewster.

We believe these tunnels were carved in the 1860s-70s, and we think we are the first ones to visit since 1897, when the mine was flooded. Water temps are constant 41-42 degrees. Dan Wright

YouTube of tunnels:

After Bernie Chowdhury located the 1988 Monte Carlo SS, at 200’ and marked it with lift bag the following weekend, John Eells and I dropped down to investigate. Reports of a large police search in 1990 for the same car, because of a stolen safe from an organized crime was rumored to be in the trunk. The state police search turned up nothing, as they were not equipped to dive at such depths, and the car ended up in the last place they would have looked, nearly 300 feet from the western bank where it was driven in. Locals have named this place: King of Shadows, as nothing dropped in had ever been seen again. The car looked a bit dented from impact on the nose, passenger side windshield cracked and passenger side T-Top missing. Driver’s door opened just like brand new, key in the ignition and it was in drive. No trunk key, John and I figured we’d have to wedge open the trunk enough to use a hacksaw on the latch. It took two dives to work the trunk apart enough with a 5’ crowbar to be able to slide a hacksaw in the cut the latch away. After spending 20 minutes on the third dive cutting, the trunk was open and indeed the safe was there. The two earlier dives I spent 45 and 50 minutes at 200’ working with the crowbar. The biggest fear was puncturing my drysuit and flooding with hours long deco in 42 degree water. After the trunk was open, two more dives to secure the safe with ratchet straps, and then lastly filling a 500 lb lift bag to send it to the surface. Once on the surface, it was pulled over to the dive platform via an inflatable, then hoisted onto the steel deck via a "come along" by John Eells. Great team effort and focus, with excellent topside support. Bernie, John, William Ahrens, Teddy Garlock, Jesse Kates, Nasreen Hague, Tim Thomas and others all pitched in to help solve a chapter in this mystery.
There is a backstory that is beyond the scope of this website, that is still being investigated

There are dive reports and video posted on the NJ forum;

Part of the diving is watching out for a body;

The 5’ diameter steel buoy is earmarked as the buoy over the Monte Carlo

Dive Site Map

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pferreira - 2/28/2017 9:50 PM
Rating Added: 3
It’s an OK dive, but spooky due to its history... Murders, bodies, stolen cars and the mafia.
Last time I checked you needed permission to dive this site.
Jonahmklein - 12/27/2017 12:37 PM
It’s an OK dive? I understood it to be the deepest dive site in the Tristate area outside of the ocean at 325’. I think Minimum bottom is 175’, meaning, there is no shallow end in this pool. Have you Dove this Site? As I recall it is private land and only divers here are Invited, with permission from owners, Highly experienced expedition divers searching for the remains of those murder victims.