Dejong Bros 1 is an earth dam located in Lyman County, South Dakota, built in 1961. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 341 ft long, taller than 74% of U.S. dams with a recorded height. 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 Dejong Bros 1
The primary purpose of Dejong Bros 1 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 Dejong Bros. (private). It impounds the White River Off Stream.
The dam stands 32 feet tall and stretches 341 feet across, and has a maximum storage capacity of 64 acre-feet. Completed in 1961, 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 | Lyman |
| Nearest City | None |
| River/Stream | White River Off Stream |
| Coordinates | 43.66833, -99.51666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 341 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 64 acre-ft |
| Max Storage | 64 acre-ft |
| Normal Storage | 14 acre-ft |
| Max Discharge | 630 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Dejong Bros. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00689 |
| Federal ID | SD00689 |
| More Info | State Dam Safety Program |