Otranto Dam
Otranto Dam is a gravity dam located in Mitchell County, Iowa, built in 1902. It carries a Low hazard potential classification.
About Otranto Dam
The primary purpose of Otranto Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mitchell County Conservation Board (local government). It impounds the Cedar River near St. Ansgar.
The dam stands 7 feet tall and stretches 170 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 168 acre-feet, and collects water from a drainage area of 656 square miles. Completed in 1902, the structure is over a century 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.
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Location
| State | Iowa |
| County | Mitchell |
| Nearest City | St. Ansgar |
| River/Stream | Cedar River |
| Coordinates | 43.45760, -92.98150 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 170 ft |
| Year Completed | 1902 (124 years old) |
Storage & Hydraulics
| NID Storage | 168 acre-ft |
| Max Storage | 168 acre-ft |
| Normal Storage | 168 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 656 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mitchell County Conservation Board |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03066 |
| Federal ID | IA03066 |
| More Info | State Dam Safety Program |