Lake Ahquabi Dam is an earth dam located in Warren County, Iowa, built in 1935. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 43 ft43 ft tall and 1,020 ft long, taller than 89% 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 Lake Ahquabi Dam
The primary purpose of Lake Ahquabi Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Iowa Department of Natural Resources (state). It impounds the Tr- Squaw Creek near Red Rock Reservoir.
The dam stands 43 feet tall and stretches 1,020 feet across, creates a reservoir covering 113 acres, has a maximum storage capacity of 2,395 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1935, the structure is well-established, with more than 75 years of service.
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 05/06/2024.
At 43 feet, this dam is taller than 89% 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 | Warren |
| Nearest City | Red Rock Reservoir |
| River/Stream | Tr- Squaw Creek |
| Coordinates | 41.29380, -93.59730 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 1,020 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 2,395 acre-ft |
| Max Storage | 2,395 acre-ft |
| Normal Storage | 1,280 acre-ft |
| Surface Area | 113 acres |
| Drainage Area | 5 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/06/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01131 |
| Federal ID | IA01131 |
| More Info | State Dam Safety Program |