Ludlow Dam is an earth dam located in Harding County, South Dakota, built in 1951. It carries a Low hazard potential classification.
Dam profile
NID height · 36 ft36 ft tall and 850 ft long, taller than 82% 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 Ludlow Dam
The primary purpose of Ludlow Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ludlow Coop. Grazing (private). It impounds the Tr-s Fork Grand River.
The dam stands 36 feet tall and stretches 850 feet across, and has a maximum storage capacity of 3,384 acre-feet. Completed in 1951, 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.
At 36 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | South Dakota |
| County | Harding |
| Nearest City | None |
| River/Stream | Tr-s Fork Grand River |
| Coordinates | 45.66049, -103.41256 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 850 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 3,384 acre-ft |
| Max Storage | 3,384 acre-ft |
| Normal Storage | 2,914 acre-ft |
| Max Discharge | 1,500 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Ludlow Coop. Grazing |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00618 |
| Federal ID | SD00618 |
| More Info | State Dam Safety Program |