Washington Co Road Dam 23-74-9 is an earth dam located in Washington County, Iowa, built in 2005. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 920 ft long, taller than 59% 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 Washington Co Road Dam 23-74-9
The primary purpose of Washington Co Road Dam 23-74-9 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 Washington County (local government). It impounds the Tr- Honey Creek near Coppock.
The dam stands 27 feet tall and stretches 920 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 481 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2005, 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 | Washington |
| Nearest City | Coppock |
| River/Stream | Tr- Honey Creek |
| Coordinates | 41.19250, -91.86580 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 920 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 481 acre-ft |
| Max Storage | 481 acre-ft |
| Normal Storage | 155 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Washington County |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03874 |
| Federal ID | IA03874 |
| More Info | State Dam Safety Program |