Upper Turtle R.fld.ret. 7
Upper Turtle R.fld.ret. 7 is an earth dam located in Grand Forks County, North Dakota, built in 1973. It carries a Low hazard potential classification.
About Upper Turtle R.fld.ret. 7
The primary purpose of Upper Turtle R.fld.ret. 7 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 near Larimore.
The dam stands 30 feet tall and stretches 4,440 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 1,387 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 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. The most recent inspection on record was 08/14/2013. That was over 12 years ago.
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Location
| State | North Dakota |
| County | Grand Forks |
| Nearest City | Larimore |
| River/Stream | South Branch Turtle River |
| Coordinates | 47.94598, -97.75069 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 4,440 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 1,387 acre-ft |
| Max Storage | 1,387 acre-ft |
| Normal Storage | 47 acre-ft |
| Surface Area | 14 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 | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 08/14/2013 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ND00389 |
| Federal ID | ND00389 |
| More Info | State Dam Safety Program |