Gary Larson Dam
Gary Larson Dam is an earth dam located in Perkins County, South Dakota, built in 1951. It carries a Low hazard potential classification.
About Gary Larson Dam
The primary purpose of Gary Larson 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 Gary Larson (private). It impounds the Tr Moreau River.
The dam stands 22 feet tall and stretches 300 feet across, creates a reservoir covering 84 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 94 square miles. Completed in 1951, the structure is well into its service life at over 50 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. The most recent inspection on record was 04/15/1980. That was over 45 years ago.
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Location
| State | South Dakota |
| County | Perkins |
| Nearest City | None |
| River/Stream | Tr Moreau River |
| Coordinates | 45.48166, -102.39999 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 300 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Normal Storage | 350 acre-ft |
| Surface Area | 84 acres |
| Drainage Area | 94 sq mi |
| Max Discharge | 15,652 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | GARY LARSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 04/15/1980 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01766 |
| Federal ID | SD01766 |
| More Info | State Dam Safety Program |