Siegel Flood Control Dam
Siegel Flood Control Dam is an earth dam located in Clayton County, Iowa, built in 1938. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Siegel Flood Control Dam
The primary purpose of Siegel Flood Control Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Mcgregor (local government). It impounds the Tr-mississippi River near Mc Gregor.
The dam stands 43 feet tall and stretches 324 feet across, has a maximum storage capacity of 94 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1938, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/05/2023.
At 43 feet, this dam is taller than 89% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Iowa dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Clayton |
| Nearest City | Mc Gregor |
| River/Stream | Tr-mississippi River |
| Coordinates | 43.01220, -91.19930 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 324 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 94 acre-ft |
| Max Storage | 94 acre-ft |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of McGregor |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/05/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IA02062 |
| Federal ID | IA02062 |
| More Info | State Dam Safety Program |