Jasper County Roadgrade Dam 20-81-20 is an earth dam located in Jasper County, Iowa, built in 2002. It carries a Low hazard potential classification.
Dam profile
NID height · 39 ft39 ft tall and 910 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 embankment section and the water level is illustrative.
About Jasper County Roadgrade Dam 20-81-20
The primary purpose of Jasper County Roadgrade Dam 20-81-20 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 Jasper County Board of Supervisors (local government). It impounds the Tr- Clear Creek near Reasnor.
The dam stands 39 feet tall and stretches 910 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 153 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.
At 39 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Iowa |
| County | Jasper |
| Nearest City | Reasnor |
| River/Stream | Tr- Clear Creek |
| Coordinates | 41.81830, -93.19670 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 910 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 153 acre-ft |
| Max Storage | 153 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Jasper County Board of Supervisors |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03689 |
| Federal ID | IA03689 |
| More Info | State Dam Safety Program |