Upper Turtle River Flood Ret. 8
Upper Turtle River Flood Ret. 8 is an earth dam located in Grand Forks County, North Dakota, built in 1973. It carries a Significant hazard potential classification.
About Upper Turtle River Flood Ret. 8
The primary purpose of Upper Turtle River Flood Ret. 8 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 Grand Forks County Wrb (local government). It impounds the South Branch Turtle River-tr near Larimore.
The dam stands 35 feet tall, creates a reservoir covering 11 acres, has a maximum storage capacity of 1,190 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1973, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/13/2013. That was over 12 years ago.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | North Dakota |
| County | Grand Forks |
| Nearest City | Larimore |
| River/Stream | South Branch Turtle River-tr |
| Coordinates | 47.93148, -97.74518 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 1,190 acre-ft |
| Max Storage | 1,190 acre-ft |
| Normal Storage | 52 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 5 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Grand Forks County WRB |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 06/13/2013 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND00390 |
| Federal ID | ND00390 |
| More Info | State Dam Safety Program |