Warren Diversion
Warren Diversion is a buttress dam located in Marshall County, Minnesota, built in 2003. It carries a Significant hazard potential classification and has a fair condition assessment.
About Warren Diversion
The primary purpose of Warren Diversion 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 Wd Of Middle-snake-tamarac Rivers (local government). It impounds the Snake River near Warren.
The dam stands 30 feet tall and stretches 4,000 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 2,000 acre-feet, and collects water from a drainage area of 175 square miles. Completed in 2003, the structure is relatively new.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 10/01/2024.
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Location
| State | Minnesota |
| County | Marshall |
| Nearest City | Warren |
| River/Stream | Snake River |
| Coordinates | 48.20411, -96.74751 |
Physical Characteristics
| Dam Type | Buttress |
| NID Height | 30 ft |
| Dam Height | 26 ft |
| Dam Length | 4,000 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 2,000 acre-ft |
| Max Storage | 2,000 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 175 sq mi |
| Max Discharge | 4,300 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | WD of Middle-Snake-Tamarac Rivers |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 10/01/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN01351 |
| Federal ID | MN01351 |
| More Info | State Dam Safety Program |