Cone Dam is an earth dam located in Lyman County, South Dakota, built in 2013. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 1,055 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 Cone Dam
The primary purpose of Cone Dam is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Richard Cone (private). It impounds the Tr. Medicine Creek.
The dam stands 14 feet tall and stretches 1,055 feet across, creates a reservoir covering 19 acres, has a maximum storage capacity of 246 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 2013, the structure is relatively new.
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 | Tr. Medicine Creek |
| Coordinates | 43.89608, -100.11215 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 1,055 ft |
| Year Completed | 2013 (13 years old) |
Storage & Hydraulics
| NID Storage | 246 acre-ft |
| Max Storage | 246 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,080 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | Richard Cone |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD02603 |
| Federal ID | SD02603 |
| More Info | State Dam Safety Program |