Smith Spreader Dam
Smith Spreader Dam is an earth dam located in Harding County, South Dakota, built in 1948. It carries a Significant hazard potential classification.
About Smith Spreader Dam
The primary purpose of Smith Spreader Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Darrel Smith (private). It impounds the Tr-grand River.
The dam stands 15 feet tall and stretches 850 feet across, and has a maximum storage capacity of 150 acre-feet. Completed in 1948, 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.
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Location
| State | South Dakota |
| County | Harding |
| Nearest City | None |
| River/Stream | Tr-grand River |
| Coordinates | 45.82833, -103.19999 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 850 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 150 acre-ft |
| Max Storage | 150 acre-ft |
| Normal Storage | 110 acre-ft |
| Max Discharge | 2,100 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | DARREL SMITH |
| Owner Type | Private |
| Hazard Classification | Significant |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01207 |
| Federal ID | SD01207 |
| More Info | State Dam Safety Program |