Dudley Dam is an earth dam located in Spink County, South Dakota, built in 1934. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 480 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 Dudley Dam
The primary purpose of Dudley Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by S&pl (state). It impounds the Tr-james River.
The dam stands 20 feet tall and stretches 480 feet across, and has a maximum storage capacity of 200 acre-feet. Completed in 1934, 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 10/17/2022.
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Location
| State | South Dakota |
| County | Spink |
| Nearest City | None |
| River/Stream | Tr-james River |
| Coordinates | 44.67112, -98.29139 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 480 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 200 acre-ft |
| Max Storage | 200 acre-ft |
| Normal Storage | 140 acre-ft |
| Max Discharge | 630 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/17/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00700 |
| Federal ID | SD00700 |
| More Info | State Dam Safety Program |