Theresa Marsh
Theresa Marsh is an earth dam located in Dodge County, Wisconsin, built in 1968. It carries a Low hazard potential classification and has a fair condition assessment.
About Theresa Marsh
The primary purpose of Theresa Marsh is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Wisconsin Department Of Natural Resources (state). It impounds the East Branch Of The Rock River near Theresa.
The dam stands 10 feet tall and stretches 5,300 feet across, creates a reservoir covering 1,500 acres, has a maximum storage capacity of 13,000 acre-feet, and collects water from a drainage area of 144 square miles. Completed in 1968, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/19/2018.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wisconsin |
| County | Dodge |
| Nearest City | Theresa |
| River/Stream | East Branch Of The Rock River |
| Coordinates | 43.52415, -88.42422 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 5,300 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 13,000 acre-ft |
| Max Storage | 13,000 acre-ft |
| Normal Storage | 2,500 acre-ft |
| Surface Area | 1,500 acres |
| Drainage Area | 144 sq mi |
| Max Discharge | 8,250 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/19/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00612 |
| Federal ID | WI00612 |
| More Info | State Dam Safety Program |