Dejong Bros 11 is an earth dam located in Lyman County, South Dakota, built in 1962. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 182 ft long, taller than 50% 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 11
The primary purpose of Dejong Bros 11 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 Trib-white River.
The dam stands 25 feet tall and stretches 182 feet across, and has a maximum storage capacity of 25 acre-feet. Completed in 1962, 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.
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Location
| State | South Dakota |
| County | Lyman |
| River/Stream | Trib-white River |
| Coordinates | 43.75333, -99.77666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 182 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 25 acre-ft |
| Max Storage | 25 acre-ft |
| Normal Storage | 7 acre-ft |
| Max Discharge | 672 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 | SD01183 |
| Federal ID | SD01183 |
| More Info | State Dam Safety Program |