Rock River at Lake Koshkonong

The past week

What floods at each level

• 14 ft

  There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.

• 13 ft

  There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.

• 12 ft

  There is widespread flooding of lakeside homes and roads in the Lake Koshkonong area including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.

• 11.3 ft

  There is knee-deep water over Blackhawk Island Road. Lamp Road on west side of river also becomes flooded. Lake Koshkonong merges with Mud Lake to the east of Lake Koshkonong.

• 11 ft

  In the Town of Lake Koshkonong, floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow Bend Road. There is widespread flooding of roads and docks in the Town of Koshkonong and Town of Sumner including Vets Lane, Blackhawk Island Road and Oxbow Bend Road.

• 10.5 ft

  Floodwaters reach Oxbow Bend Road in the area of the gage on the east side of the lake. Flooded roads: The end of Road 9, end of E Road 8 St, end of E Road 7, Lakeview Dr, Charley Bluff Rd north of Royce Dallman Park, parts of Lamp Rd, Willow Rd, parts of Blackhawk Island Rd. Water surrounds some structures on Lamp Rd and towards end of Blackhawk Island Rd. Low lying areas of Lakeland Campground flood. Altpeter County Park floods. Water into yards along High Ridge Rd.

• 10 ft

  Floodwaters affect homes and boat docks in the Blackhawk Island area of Lake Koshkonong on the north side of the lake. Floodwaters spread over low spots on Blackhawk Island Road in the area where the Rock River enters the lake.

• 9.5 ft

  Water is into low lying areas along Lake Koshkonong. Water approaches homes along Blackhawk Island.

• 9 ft

  Water spreads into low lying areas along Lake Koshkonong. Water into yards along Blackhawk Island.

Highest crests on record

Flood map

See which streets and areas flood at each water level here. Open the flood map ↗

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