Waubonsie Cr. Watershed Site M-1
Waubonsie Cr. Watershed Site M-1 is an earth dam located in Mills County, Iowa, built in 1978. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Waubonsie Cr. Watershed Site M-1
Waubonsie Cr. Watershed Site M-1 is a dam in Mills, Iowa. The dam is owned by Mills County Swcd (local government). It impounds the Tr-waubonsie Creek near Bartlett.
The dam stands 42 feet tall and stretches 710 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 968 acre-feet, and collects water from a drainage area of 19 square miles. Completed in 1978, the structure is 48 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 07/29/2020.
At 42 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Iowa |
| County | Mills |
| Nearest City | Bartlett |
| River/Stream | Tr-waubonsie Creek |
| Coordinates | 40.91960, -95.73890 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 710 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 968 acre-ft |
| Max Storage | 968 acre-ft |
| Normal Storage | 359 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 19 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Mills County SWCD |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/29/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01828 |
| Federal ID | IA01828 |
| More Info | State Dam Safety Program |