Tamarac River R1
Tamarac River R1 is an earth dam located in Marshall County, Minnesota, built in 1975. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Tamarac River R1
The primary purpose of Tamarac River R1 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 Swcd Of Marshall County (local government). It impounds the Tamarac River near Stephen.
The dam stands 21 feet tall and stretches 11,000 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 1,168 acre-feet, and collects water from a drainage area of 225 square miles. Completed in 1975, the structure is well into its service life at over 50 years 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 10/01/2024.
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Location
| State | Minnesota |
| County | Marshall |
| Nearest City | Stephen |
| River/Stream | Tamarac River |
| Coordinates | 48.42449, -96.65790 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 11,000 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 1,168 acre-ft |
| Max Storage | 1,168 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 225 sq mi |
| Max Discharge | 2,240 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | SWCD of Marshall County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/01/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00889 |
| Federal ID | MN00889 |
| More Info | State Dam Safety Program |