Porter Moss Agate Dam
Porter Moss Agate Dam is an earth dam located in Fall River County, South Dakota, built in 1940. It carries a Low hazard potential classification.
About Porter Moss Agate Dam
The primary purpose of Porter Moss Agate Dam 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 Everett Porter (private). It impounds the Moss Agate Creek.
The dam stands 18 feet tall and stretches 550 feet across, and has a maximum storage capacity of 144 acre-feet. Completed in 1940, the structure is well-established, with more than 75 years of service.
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 | Fall River |
| Nearest City | None |
| River/Stream | Moss Agate Creek |
| Coordinates | 43.37074, -103.96401 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 550 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 144 acre-ft |
| Max Storage | 144 acre-ft |
| Normal Storage | 120 acre-ft |
| Max Discharge | 1,440 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Everett Porter |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01163 |
| Federal ID | SD01163 |
| More Info | State Dam Safety Program |