Glad Valley is an earth dam located in Ziebach County, South Dakota, built in 1938. It carries a Low hazard potential classification.
Dam profile
NID height · 18 ft18 ft tall and 800 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 Glad Valley
The primary purpose of Glad Valley 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 Grand.
The dam stands 18 feet tall and stretches 800 feet across, and has a maximum storage capacity of 1,146 acre-feet. Completed in 1938, 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 10/11/2018.
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Location
| State | South Dakota |
| County | Ziebach |
| Nearest City | None |
| River/Stream | Tr Grand |
| Coordinates | 45.44361, -101.78867 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 800 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 1,146 acre-ft |
| Max Storage | 1,146 acre-ft |
| Normal Storage | 308 acre-ft |
| Max Discharge | 1,757 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | S&pl |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/11/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00323 |
| Federal ID | SD00323 |
| More Info | State Dam Safety Program |