Olsen Dam
Olsen Dam is an earth dam located in Ziebach County, South Dakota, built in 1995. It carries a Low hazard potential classification.
About Olsen Dam
The primary purpose of Olsen Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Erling Olsen (private). It impounds the Trib. Ash Creek.
The dam stands 18 feet tall and stretches 480 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 83 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1995, the structure is 31 years old.
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.
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Location
| State | South Dakota |
| County | Ziebach |
| Nearest City | None |
| River/Stream | Trib. Ash Creek |
| Coordinates | 44.83666, -101.70832 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 480 ft |
| Year Completed | 1995 (31 years old) |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 810 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | ERLING OLSEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02419 |
| Federal ID | SD02419 |
| More Info | State Dam Safety Program |