Blackhawk Lake Dam, Wisconsin

Blackhawk Lake Dam on the Otter Creek & Cave Hollow Br in Wisconsin.

43.02637, -90.2796 · Iowa County · NID WI00014. Tap the map to open this water in the live app.

What the runs do here

Otter Creek & Cave Hollow Br carries no anadromous run on our corridor map, so this page makes no claim about salmon or steelhead at this dam. What it sits on is coldwater — resident trout water — and the section below says which classification says so.

The structure

Owner: Iowa County Local Government
Purpose: Recreation
Completed: 1969
Type: Earth
Height: 50 ft
Length: 1130 ft
Spillway: Controlled
Storage: 7,900 acre-ft · 220 acre pool
Drainage: 16 sq mi
Condition: Fair · Low hazard potential

From the National Inventory of Dams (USACE). Hazard potential is a downstream-consequence classification, not a statement about the structure's condition.

The water above and below

Otter Creek 0.31 mi from the dam · Class II · wild supplemented (WDNR) · typed Cold
Flint Creek 1.46 mi from the dam · Class II · wild supplemented (WDNR) · typed Cold

Coldwater designation is the state's own classification. A dam sits on one river and this list is every designated reach within a mile and a half of it, so a tributary mouth shows up here too.

Water right now

No USGS temperature gauge we read reports within 20 miles of this dam, so this page has no live number for it. That is a gap in the gauge network, not a judgement about the water.

Getting to it

The dam sits on or beside public land, SDNR.

Blackhawk Lake 0.5 mi · boat launch · Blackhawk Lake

Public access sites near the dam, straight-line distance. A dam itself is private property unless its owner says otherwise; these are the places the state lists as open.

The river this is on

Otter Creek Live temperature, regulations, hatches and access on the whole river →

Open this water on the map →Every reach around it coloured by today's water temperature, with the access points along it.