Pearl Ross is an earth dam located in Perkins County, South Dakota, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 500 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 Pearl Ross
The primary purpose of Pearl Ross 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 Johnson Bros. (private). It impounds the Tr South Grand River.
The dam stands 20 feet tall and stretches 500 feet across, and has a maximum storage capacity of 72 acre-feet. Completed in 1956, 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 | Perkins |
| Nearest City | None |
| River/Stream | Tr South Grand River |
| Coordinates | 45.65666, -102.38666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 500 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 72 acre-ft |
| Max Storage | 72 acre-ft |
| Normal Storage | 50 acre-ft |
| Max Discharge | 150 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Johnson Bros. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01770 |
| Federal ID | SD01770 |
| More Info | State Dam Safety Program |