Izzak Walton League Dam
Izzak Walton League Dam is an earth dam located in Wapello County, Iowa, built in 1965. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Izzak Walton League Dam
The primary purpose of Izzak Walton League Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Izaak Walton League - Ottumwa Chapter (private). It impounds the Tr-sugar Creek near Ottumwa.
The dam stands 35 feet tall and stretches 420 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 191 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, the structure is well into its service life at over 50 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 06/16/2022.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Iowa |
| County | Wapello |
| Nearest City | Ottumwa |
| River/Stream | Tr-sugar Creek |
| Coordinates | 41.01890, -92.36540 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 420 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 191 acre-ft |
| Max Storage | 191 acre-ft |
| Normal Storage | 137 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Izaak Walton League - Ottumwa Chapter |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/16/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01109 |
| Federal ID | IA01109 |
| More Info | State Dam Safety Program |