George Knapp Dam is an earth dam located in Pennington County, South Dakota, built in 1955. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 1,060 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About George Knapp Dam
The primary purpose of George Knapp Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by H&k Ranch (private). It impounds the Tr-cheyenne.
The dam stands 15 feet tall and stretches 1,060 feet across, and has a maximum storage capacity of 110 acre-feet. Completed in 1955, 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 | 43.93499, -102.28332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 1,060 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 110 acre-ft |
| Max Storage | 110 acre-ft |
| Normal Storage | 48 acre-ft |
| Max Discharge | 1,800 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | H&k Ranch |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01963 |
| Federal ID | SD01963 |
| More Info | State Dam Safety Program |