


Lake Koshkonong
A wide, shallow marsh-turned-lake on the Rock River, transformed by a 1932 dam.
- 10 ft · first step
- 20 ft
- 29 ft
- 39 ft
- 49 ft
- 59 ft · bottom
About Lake Koshkonong
Lake Koshkonong is a broad, shallow widening of the Rock River in southern Wisconsin, spread across Dane, Jefferson and Rock counties, covering more than 10,500 acres but averaging only about 6 feet deep. It was largely marshland until the Indianford Dam, completed in 1932, raised and stabilized the water level into the lake seen today. Its warm, murky water is prime habitat for panfish, catfish and walleye, and Native American effigy mounds along its shores mark centuries of earlier settlement around the lake basin.
- 24 shore towns named, with a star on each
- 284 roads engraved around the shore, 14 of them labeled
- 6 depth layers, each step engraved with its depth in feet
- Compass rose, title block with coordinates, max depth and area; keyhole hanger on the back
Turn it in your hands
Live 3D of the actual cut files — drag to orbit, pinch to zoom. Every road you see is engraved on the real thing.
Viewer not showing? Open it full screen.


