East Morristown Lake is an earth dam located in Corson County, South Dakota, built in 1910. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 900 ft long, taller than 78% 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 East Morristown Lake
The primary purpose of East Morristown Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Railroad (private). It impounds the Tr-hay Creek.
The dam stands 34 feet tall and stretches 900 feet across, and has a maximum storage capacity of 1,360 acre-feet. Completed in 1910, the structure is over a century 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.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | South Dakota |
| County | Corson |
| Nearest City | None |
| River/Stream | Tr-hay Creek |
| Coordinates | 45.93218, -101.64341 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 900 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 1,360 acre-ft |
| Max Storage | 1,360 acre-ft |
| Normal Storage | 259 acre-ft |
| Max Discharge | 1,200 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Railroad |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00739 |
| Federal ID | SD00739 |
| More Info | State Dam Safety Program |