Scoria Bay Formations is a freshwater site in the United States characterised by rugged red scoria rock formations. The underwater landscape features submerged petrified wood and coal veins, which are particularly visible when water levels are lower. Depths range from 2 to 15 metres, with an average of 13 metres. Conditions include mild currents and visibility between 4 and 6 metres. The site is accessible by both shore and boat. Divers and snorkellers should be aware of cold water temperatures, boat traffic, and low visibility. Facilities available at the site include parking, toilets, showers, and boat charter services.

Garrison Dam Tailrace is a freshwater site offering a unique environment for advanced divers and snorkelers. The water originates from the bottom of Lake Sakakawea, resulting in consistently cold temperatures that range from 0°C to 15.5°C. Divers should expect moderate currents and visibility between 3 and 6 metres. Depths at the site reach up to 9 metres. Access is via a shore entry. Due to the nature of the tailrace, hazards include boat traffic, strong currents, and low visibility. Facilities available at the site include parking, toilets, and showers.

Government Bay is a freshwater dive site defined by dramatic sandstone and mudstone cliffs that extend underwater to form vertical structures and drop-offs. The site reaches depths of 55 metres, with an average depth of 13 metres. Divers can access the water from the shore or by boat. Conditions vary, with mild currents and potential thermoclines. Water temperatures fluctuate significantly, ranging from 2.7°C in early spring to 27°C during summer months. Due to the cold water, hypothermia is a risk, and divers should be prepared for varying visibility and potential boat traffic in the area. The site is suited for intermediate divers.