Leonard Ziesier No.1 is an earth dam located in Gregory County, South Dakota, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 371 ft long, taller than 68% 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 Leonard Ziesier No.1
The primary purpose of Leonard Ziesier No.1 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 Eat-garwood Ranch LLC (private). It impounds the Ponca Creek-tr.
The dam stands 30 feet tall and stretches 371 feet across, and has a maximum storage capacity of 19 acre-feet. Completed in 1970, 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 | Gregory |
| Nearest City | None |
| River/Stream | Ponca Creek-tr |
| Coordinates | 43.03466, -99.10689 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 371 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 19 acre-ft |
| Max Storage | 19 acre-ft |
| Normal Storage | 13 acre-ft |
| Max Discharge | 460 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Eat-garwood Ranch LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00546 |
| Federal ID | SD00546 |
| More Info | State Dam Safety Program |