Harold Dam is an earth dam located in Montgomery County, Iowa, built in 2005. It carries a Low hazard potential classification.
Dam profile
NID height · 29 ft29 ft tall and 615 ft long, taller than 65% 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 Harold Dam
The primary purpose of Harold Dam 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 Keith Harold (private). It impounds the Trib to Walnut Creek near Hamburg.
The dam stands 29 feet tall and stretches 615 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 113 acre-feet, and collects water from a drainage area of 0 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 | Montgomery |
| Nearest City | Hamburg |
| River/Stream | Trib to Walnut Creek |
| Coordinates | 40.93560, -95.32670 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 615 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 113 acre-ft |
| Max Storage | 113 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 165 cfs |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Keith Harold |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04066 |
| Federal ID | IA04066 |
| More Info | State Dam Safety Program |