Welch Dam is an earth dam located in Sioux County, North Dakota, built in 1936. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 350 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Welch Dam
The primary purpose of Welch Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Sioux County Wrb (local government). It impounds the Cannonball River-tr near N.
The dam stands 23 feet tall and stretches 350 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 88 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1936, the structure is well-established, with more than 75 years of service.
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 10/14/2002. That was over 24 years ago.
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Location
| State | North Dakota |
| County | Sioux |
| Nearest City | N |
| River/Stream | Cannonball River-tr |
| Coordinates | 46.37592, -100.86216 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 350 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 88 acre-ft |
| Max Storage | 88 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Sioux County Wrb |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/14/2002 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ND00553 |
| Federal ID | ND00553 |
| More Info | State Dam Safety Program |