Mississippi River Locks and Dam 14 is a concrete dam located in Scott County, Iowa, built in 1939. It carries a Significant hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 2,874 ft long, taller than 85% 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 concrete gravity section and the water level is illustrative.
About Mississippi River Locks and Dam 14
The primary purpose of Mississippi River Locks and Dam 14 is navigation. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway. The dam is owned by USACE - Rock Island District (federal). It impounds the Mississippi River near Hampton.
The dam stands 39 feet tall and stretches 2,874 feet across, creates a reservoir covering 10,450 acres, has a maximum storage capacity of 82,000 acre-feet, and collects water from a drainage area of 88,400 square miles. Completed in 1939, the structure is well-established, with more than 75 years of service.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 07/09/2025.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Iowa |
| County | Scott |
| Nearest City | Hampton |
| River/Stream | Mississippi River |
| Coordinates | 41.57389, -90.39951 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 39 ft |
| Dam Length | 2,874 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 82,000 acre-ft |
| Max Storage | 82,000 acre-ft |
| Surface Area | 10,450 acres |
| Drainage Area | 88,400 sq mi |
| Max Discharge | 344,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Navigation |
| Owner | USACE - Rock Island District |
| Owner Type | Federal |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/09/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IA00006 |
| Federal ID | IA00006 |
| More Info | State Dam Safety Program |