Rolling Hills Dam is an earth dam located in Johnson County, Iowa, built in 2002. It carries a Significant hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 440 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 Rolling Hills Dam
The primary purpose of Rolling Hills Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Kurt Croell (private). It impounds the Tr- Clear Creek near Tiffin.
The dam stands 20 feet tall and stretches 440 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 51 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 significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Iowa |
| County | Johnson |
| Nearest City | Tiffin |
| River/Stream | Tr- Clear Creek |
| Coordinates | 41.71000, -91.66330 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 440 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 28 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Kurt Croell |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03703 |
| Federal ID | IA03703 |
| More Info | State Dam Safety Program |