Mitchell Mill Dam
Mitchell Mill Dam is a buttress dam located in Mitchell County, Iowa, built in 1925. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Mitchell Mill Dam
The primary purpose of Mitchell Mill Dam is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Mitchell County Conservation Board (local government). It impounds the Red Cedar.
The dam stands 19 feet tall and stretches 590 feet across, creates a reservoir covering 120 acres, has a storage capacity of 1,454 acre-feet, and collects water from a drainage area of 826 square miles. Completed in 1925, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 09/08/2022.
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Location
| State | Iowa |
| County | Mitchell |
| Nearest City | None |
| River/Stream | Red Cedar |
| Coordinates | 43.31830, -92.88040 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 590 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 1,454 acre-ft |
| Normal Storage | 1,454 acre-ft |
| Surface Area | 120 acres |
| Drainage Area | 826 sq mi |
| Max Discharge | 46,500 cfs |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Mitchell County Conservation Board |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/08/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01312 |
| Federal ID | IA01312 |
| More Info | State Dam Safety Program |