Identification & Site Information – “Gold Mine” Pinnacle

• Site Name: “Gold Mine” Pinnacle

• Location: Offshore from Presque Isle, Lake Superior, near Marquette, Michigan

• Coordinates: N 46° 35.380 W 087° 21.750

• Depth Range: 12 feet to 150 feet (3.7 to 45.7 meters)

• Diving Level: Advanced; depths extend beyond typical recreational diving limits

Site Description

“Gold Mine” Pinnacle is an underwater geological formation located near Presque Isle on the shores of Lake Superior. This pinnacle is known for its dramatic depth variance, beginning as shallow as 12 feet and plunging to depths as deep as 150 feet. The rock formation is narrow and rises sharply from the lakebed, creating an intricate underwater landscape with steep walls and ledges. Due to the variance in depth, this pinnacle offers divers an exciting range of topographical features to explore, from shallow plateaus to steep drop-offs.

Pinnacles like this are often teeming with aquatic life, as the varied terrain provides ideal habitats for fish and plant species. Additionally, the rock faces may feature crevices and overhangs, making this an ideal dive for observing the geology and biodiversity typical of Lake Superior’s unique underwater environment.

Diving Notes & Challenges

The wide range of depths and potentially challenging conditions make “Gold Mine” Pinnacle an advanced dive site. Key considerations include:

• Currents: The pinnacle is exposed to lake currents, which may vary depending on weather conditions and depth. Currents may be stronger at deeper levels, making the site more suited to experienced divers.

• Depth Variability: With depths ranging well beyond recreational limits (up to 150 feet), divers need to carefully monitor their depth and ensure adequate air supply and thermal protection.

• Temperature: Lake Superior’s water temperatures are cold, particularly at depth, and can drop significantly below recreational scuba diving comfort levels. Appropriate exposure protection, such as dry suits, is recommended.

Significance

The “Gold Mine” Pinnacle serves as a notable geological site for divers in Lake Superior, presenting a combination of historical intrigue and natural beauty. This site’s depth range and unique underwater formations make it ideal for advanced divers interested in both the ecological and geological aspects of the Great Lakes. The pinnacle is also a reminder of Lake Superior’s rugged, untamed nature, offering a starkly different experience from more common dive sites with gradual depth changes.

Resources & Links

For more information on advanced dives near Presque Isle and other Lake Superior dive sites:

• Great Lakes Shipwreck Museum: Provides insights into historical sites and dive information for the region

• Local Dive Centers in Marquette, Michigan: Can offer guided dives, depth-specific training, and up-to-date conditions