Jefferson County Roadgrade Dam 16-73-9 is an earth dam located in Jefferson County, Iowa, built in 2002. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 554 ft long. 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 Jefferson County Roadgrade Dam 16-73-9
The primary purpose of Jefferson County Roadgrade Dam 16-73-9 is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Jefferson County (local government). It impounds the Tr- Walnut Creek near Rome.
The dam stands 24 feet tall and stretches 554 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 130 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2002, 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 | Jefferson |
| Nearest City | Rome |
| River/Stream | Tr- Walnut Creek |
| Coordinates | 41.13170, -91.89170 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 554 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 130 acre-ft |
| Max Storage | 130 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Jefferson County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03700 |
| Federal ID | IA03700 |
| More Info | State Dam Safety Program |