Polk County Roadgrade Dam 21-78-22 is an earth dam located in Polk County, Iowa, built in 1992. It carries a Low hazard potential classification.
Dam profile
NID height · 41 ft41 ft tall and 803 ft long, taller than 87% 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 Polk County Roadgrade Dam 21-78-22
Polk County Roadgrade Dam 21-78-22 is a dam in Polk, Iowa. The dam is owned by Polk County Public Works Dept (local government). It impounds the Tr- MUD Creek near Red Rock Reservoir.
The dam stands 41 feet tall and stretches 803 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 112 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1992, the structure is 34 years 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.
At 41 feet, this dam is taller than 87% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Polk |
| Nearest City | Red Rock Reservoir |
| River/Stream | Tr- MUD Creek |
| Coordinates | 41.54890, -93.40310 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 41 ft |
| Dam Length | 803 ft |
| Year Completed | 1992 (34 years old) |
Storage & Hydraulics
| NID Storage | 112 acre-ft |
| Max Storage | 112 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Polk County Public Works Dept |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02659 |
| Federal ID | IA02659 |
| More Info | State Dam Safety Program |