Larsen Lyman 2
Larsen Lyman 2 is an earth dam located in Pennington County, South Dakota, built in 1959. It carries a Low hazard potential classification.
About Larsen Lyman 2
The primary purpose of Larsen Lyman 2 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 Walter E. Witcher (private). It impounds the Tr-cheyenne.
The dam stands 20 feet tall and stretches 530 feet across, and has a maximum storage capacity of 80 acre-feet. Completed in 1959, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Pennington |
| Nearest City | None |
| River/Stream | Tr-cheyenne |
| Coordinates | 43.82166, -102.47499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 530 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 54 acre-ft |
| Max Discharge | 1,000 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | WALTER E. WITCHER |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01923 |
| Federal ID | SD01923 |
| More Info | State Dam Safety Program |