Larsen Irrigation Dam
Larsen Irrigation Dam is an earth dam located in Lyman County, South Dakota, built in 1978. It carries a Low hazard potential classification.
About Larsen Irrigation Dam
The primary purpose of Larsen Irrigation Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Larry Larsen (private). It impounds the Tr-counselor Creek.
The dam stands 25 feet tall and stretches 962 feet across, has a maximum storage capacity of 108 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1978, the structure is 48 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 | Lyman |
| River/Stream | Tr-counselor Creek |
| Coordinates | 43.96166, -99.51666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 962 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 108 acre-ft |
| Max Storage | 108 acre-ft |
| Normal Storage | 72 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 675 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LARRY LARSEN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02474 |
| Federal ID | SD02474 |
| More Info | State Dam Safety Program |