Blacktail Dam
Blacktail Dam is an earth dam located in Williams County, North Dakota, built in 1959. It carries a Significant hazard potential classification.
About Blacktail Dam
The primary purpose of Blacktail Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nd Game & Fish (state). It impounds the Blacktail Creek near N.
The dam stands 63 feet tall and stretches 2,250 feet across, creates a reservoir covering 158 acres, has a maximum storage capacity of 5,317 acre-feet, and collects water from a drainage area of 27 square miles. Completed in 1959, 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 05/21/2018.
At 63 feet, this dam is taller than 96% of all dams in the United States.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | North Dakota |
| County | Williams |
| Nearest City | N |
| River/Stream | Blacktail Creek |
| Coordinates | 48.43263, -103.73036 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 63 ft |
| Dam Height | 57 ft |
| Dam Length | 2,250 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 5,317 acre-ft |
| Max Storage | 5,317 acre-ft |
| Normal Storage | 2,668 acre-ft |
| Surface Area | 158 acres |
| Drainage Area | 27 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | ND Game & Fish |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 05/21/2018 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ND00033 |
| Federal ID | ND00033 |
| More Info | State Dam Safety Program |