Muscatine County Roadgrade Dam 14-77-1e is an earth dam located in Muscatine County, Iowa, built in 1971. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 38 ft38 ft tall and 680 ft long, taller than 84% 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 Muscatine County Roadgrade Dam 14-77-1e
Muscatine County Roadgrade Dam 14-77-1e is a dam in Muscatine, Iowa. The dam is owned by Muscatine County Board of Supervisors (local government). It impounds the Tr-mississippi River near Montpelier.
The dam stands 38 feet tall and stretches 680 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 421 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1971, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 07/18/2023.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Iowa |
| County | Muscatine |
| Nearest City | Montpelier |
| River/Stream | Tr-mississippi River |
| Coordinates | 41.46620, -90.80650 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 680 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 421 acre-ft |
| Max Storage | 421 acre-ft |
| Normal Storage | 118 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Muscatine County Board of Supervisors |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/18/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00828 |
| Federal ID | IA00828 |
| More Info | State Dam Safety Program |