Waggoner is an earth dam located in Haakon County, South Dakota, built in 1940. It carries a Significant hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 800 ft long, taller than 59% of U.S. dams with a recorded height. 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 Waggoner
The primary purpose of Waggoner is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Philip (local government). It impounds the Grindstone Creek near Midland.
The dam stands 27 feet tall and stretches 800 feet across, creates a reservoir covering 89 acres, has a maximum storage capacity of 2,022 acre-feet, and collects water from a drainage area of 60 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 11/03/2020.
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Location
| State | South Dakota |
| County | Haakon |
| Nearest City | Midland |
| River/Stream | Grindstone Creek |
| Coordinates | 44.07434, -101.64981 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 800 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 2,022 acre-ft |
| Max Storage | 2,022 acre-ft |
| Normal Storage | 761 acre-ft |
| Surface Area | 89 acres |
| Drainage Area | 60 sq mi |
| Max Discharge | 4,075 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Philip |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/03/2020 |
Identifiers
| NID ID | SD00020 |
| Federal ID | SD00020 |
| More Info | State Dam Safety Program |