Sd Noname 129 is an earth dam located in Haakon County, South Dakota, built in 1958. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 480 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 Sd Noname 129
The primary purpose of Sd Noname 129 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 Michael Mortellaro (private). It impounds the Grindstone Creek-tr.
The dam stands 20 feet tall and stretches 480 feet across, and has a maximum storage capacity of 112 acre-feet. Completed in 1958, 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 | Haakon |
| Nearest City | None |
| River/Stream | Grindstone Creek-tr |
| Coordinates | 44.19113, -101.70224 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 480 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 112 acre-ft |
| Max Storage | 112 acre-ft |
| Normal Storage | 32 acre-ft |
| Max Discharge | 3,150 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Michael Mortellaro |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00853 |
| Federal ID | SD00853 |
| More Info | State Dam Safety Program |