NTL-LTER Winter Sampling - CFL
The ice thickness on February 22nd, was 17 centimeters (or just under 7 inches). Bier says that the Madison lakes usually have 12 to 18 inches of ice (when they're frozen) this time of year.

The ice thickness on February 22nd, was 17 centimeters (or just under 7 inches). Bier says that the Madison lakes usually have 12 to 18 inches of ice (when they're frozen) this time of year.