
Drawdown of Big Creek Dam (Crawford County) prior to culvert and outlet renovation in 2016. The riser structure visible here was not renovated in 2016. Photo courtesy of Michigan DNBR
A grant project by Michigan Trout Unlimited will inform the removal process
The Michigan Department of Natural Resources is pursuing removal of Big Creek Dam (Crawford County), a 62-year-old dam with significant structural issues. To that end, the DNR recently awarded a $75,000 grant to Michigan Trout Unlimited for a study of engineering, design and construction costs that will inform the removal process for the dam.
Big Creek Dam, which impounds Middle Branch Big Creek, is managed by the DNR and is surrounded by DNR-managed lands. The dam was constructed in 1964, with the goal of providing fishing opportunities and benefits to the trout fishery downstream — the impoundment is located on a tributary of the North Branch Au Sable River, which is known for its high-profile trout fishing. The dam, however, did not meet these goals; it negatively affected trout habitat, was not shown to help maintain coldwater conditions downstream and did not provide unique fishing opportunities not found in natural lakes in the area.
The dam was drawn down in 2025 after inspections found significant damage to the concrete riser structure and headwall. The timing of the drawdown was fortunate, as this spring’s high water levels and flooding would have posed a serious risk of dam failure for the compromised structure. Such a failure would have destructive effects on the downstream ecology of Middle Branch Big Creek and the North Branch Au Sable River.
Given the current condition of the structure, repairing Big Creek Dam is not feasible. Read more