You may want to look into Wazee Lake, WI (about 2 1/4) south east on Minneapolis.
Wazee Lake is recognized as the deepest inland lake in the state of Wisconsin, with a maximum depth of 355'.Visibility in the lake averages 30-40 feet during the summer months. Water temperatures run from approximately 70 + degrees at the surface to 50+ degrees below the first thermocline. The thermocline depth varies during the summer, but averages about 30 feet. A second thermocline at approximately 60 feet where the temperature drops to a chilly 34 degrees.
There are several groups of fish cribs as well as four dive platforms used by instructors for training new divers. Fish species include rainbow, brook and brown trout, blue gills, suckers, catfish, and small mouth bass.
We rented tanks and weights from Wazee Sports Center, W10120 Hwy. 54 East Black River Falls, WI 54615.
They are online, both the rec area and the dive shop.