East Fork Grand River Watershed Site A-121 is an earth dam located in Ringgold County, Iowa, built in 2010. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 570 ft long, taller than 62% 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 East Fork Grand River Watershed Site A-121
The primary purpose of East Fork Grand River Watershed Site A-121 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Mark Triggs & Ringgold County Swcd (local government). It impounds the Trib to E. Fork Grand River near State of Mo.
The dam stands 28 feet tall and stretches 570 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 89 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2010, 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 | Iowa |
| County | Ringgold |
| Nearest City | State of Mo |
| River/Stream | Trib to E. Fork Grand River |
| Coordinates | 40.71820, -94.20530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 570 ft |
| Year Completed | 2010 (16 years old) |
Storage & Hydraulics
| NID Storage | 89 acre-ft |
| Max Storage | 89 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 154 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Mark Triggs & Ringgold County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04161 |
| Federal ID | IA04161 |
| More Info | State Dam Safety Program |