Theresa Marsh

EAST BRANCH OF THE ROCK RIVER· Dodge, Wisconsin· Built 1968· Earth· 10 ft tall
Low Hazard Recreation State Government

Key Takeaway

Theresa Marsh is classified as low hazard in Wisconsin. It was completed in 1968 and is 58 years old. Its primary use is recreation.

Physical Details

Dam Height 10 ft (taller than 17.3% in WI)
Dam Length5,300 ft
Dam TypeEarth
Max Storage13.0K acre-ft
Normal Storage2.5K acre-ft
Surface Area1,500 acres
Drainage Area144 sq mi
Max Discharge8,250 cfs
Year Completed1968 (58 years old)
NID IDWI00612

Safety Information

Low Hazard

No probable loss of human life and low economic/environmental losses expected.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: July 19, 2018
State Regulated: Yes
Regulatory Agency: WIDNR

Ownership

Wisconsin Department of Natural Resources

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Theresa Marsh?

Theresa Marsh is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Theresa Marsh?

Theresa Marsh is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Theresa Marsh built?

Theresa Marsh was completed in 1968, making it 58 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Theresa Marsh?

Theresa Marsh serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Theresa Marsh?

Theresa Marsh has a dam height of 10 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.

When was Theresa Marsh last inspected?

Theresa Marsh was last inspected on July 19, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.