Progress Park Dam is an earth dam located in Johnson County, Iowa, built in 2005. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 1,455 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 Progress Park Dam
The primary purpose of Progress Park Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Cedar Development (private). It impounds the Tr- Iowa River near North Liberty.
The dam stands 23 feet tall and stretches 1,455 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 288 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 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 04/04/2023.
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Location
| State | Iowa |
| County | Johnson |
| Nearest City | North Liberty |
| River/Stream | Tr- Iowa River |
| Coordinates | 41.75930, -91.63530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 1,455 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 288 acre-ft |
| Max Storage | 288 acre-ft |
| Normal Storage | 86 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Cedar Development |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/04/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03517 |
| Federal ID | IA03517 |
| More Info | State Dam Safety Program |