T/B/D
Bonne Terre Mine, MO
A year-round open-water training site, in the heart of the Midwest, is how Doug Goergens likes to
promote Bonne Terre Mine, an underground dive site 60 miles south of St. Louis. The former St. Joe
Lead Mine contains the remnants of a mining operation that started in 1870 and lasted nearly a century.
In 1961, miners walked away, leaving spring-fed water to engulf their tracks, tunnels and a virtual
museum of mining equipment. The world's largest underground mine became the largest underground lake.
In 1974, the mine joined the National Register of Historic Places. Except for walking tours, little else
occurred at the mine until the arrival of Goergens and his wife, Cathy, owners of West End Diving in St.
Louis. Looking for an alternate place to stage open-water training dives, the couple eventually bought
the mine, and by 1981 had turned it into a dive destination. Mere words can't accurately describe the
size of the underground treasure. There are 17 miles of navigable shoreline, 24 dive trails illuminated by
500,000 watts of lighting, and a dive platform. In September, the mine hosted the first underground
wakeboard competition, which is scheduled for broadcast November 9 on cable TV station TNN. Each
weekend groups of 10 people are guided by a lead diver and assisted by a safety diver who follows behind.
To ensure optimal appreciation for the environment, dive lights are not permitted. Bonne Terre easily
accommodates divers of all levels. A c-card is all that's required.

Depths to: 100 feet (30 m); the average depth being 40-60 feet (12-18 m)
Visibility: Exceeds 100 feet (30 m)
Water temperature: 58 degrees Fahrenheit (14 degrees Celsius) year-round. A 7 mm wet suit or a
dry suit is recommended. There is no thermocline.
Marine life: None but history is the draw. "Indiana Jones" underwater, is how one staffer
described it. Mammoth architecture, calcium falls, oar carts, scaffolding, grating, staircases,
pillars, slurry pipes, a famed elevator shaft, among other things.
On-site amenities: Tanks, training platform. The mine is in the middle of town where lodging and
dining are available.