Old Reservoir Dam is an earth dam located in Ringgold County, Iowa, built in 1920. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 500 ft long, taller than 50% 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 Old Reservoir Dam
The primary purpose of Old Reservoir Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Mounty Ayr (local government). It impounds the Tr-walnut Creek near Isadora, Mo.
The dam stands 25 feet tall and stretches 500 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 147 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1920, the structure is over a century 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. The most recent inspection on record was 05/04/1988. That was over 38 years ago.
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Location
| State | Iowa |
| County | Ringgold |
| Nearest City | Isadora, Mo |
| River/Stream | Tr-walnut Creek |
| Coordinates | 40.72870, -94.22620 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 500 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 147 acre-ft |
| Max Storage | 147 acre-ft |
| Normal Storage | 94 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Mounty Ayr |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/04/1988 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01369 |
| Federal ID | IA01369 |
| More Info | State Dam Safety Program |