Cedar Grove Colony Dam is an earth dam located in Brule County, South Dakota, built in 1937. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 300 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 Cedar Grove Colony Dam
The primary purpose of Cedar Grove Colony Dam 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 Cedar Grove Colony (private). It impounds the Trib. Platte Creek.
The dam stands 19 feet tall and stretches 300 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1937, the structure is well-established, with more than 75 years of service.
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 | Brule |
| Nearest City | None |
| River/Stream | Trib. Platte Creek |
| Coordinates | 43.52907, -98.79887 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 300 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 52 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,523 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Cedar Grove Colony |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02445 |
| Federal ID | SD02445 |
| More Info | State Dam Safety Program |