Nine Eagles Park Lake Dam is an earth dam located in Decatur County, Iowa, built in 1930. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 53 ft53 ft tall and 1,000 ft long, taller than 93% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Nine Eagles Park Lake Dam
The primary purpose of Nine Eagles Park Lake 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-thompson River near Cainsville, Mo.
The dam stands 53 feet tall and stretches 1,000 feet across, creates a reservoir covering 59 acres, has a maximum storage capacity of 1,560 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1930, 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/09/2022.
At 53 feet, this dam is taller than 93% 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 | Decatur |
| Nearest City | Cainsville, Mo |
| River/Stream | Tr-thompson River |
| Coordinates | 40.59670, -93.77370 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 53 ft |
| Dam Height | 53 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 1,560 acre-ft |
| Max Storage | 1,560 acre-ft |
| Normal Storage | 840 acre-ft |
| Surface Area | 59 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Iowa Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/09/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA01340 |
| Federal ID | IA01340 |
| More Info | State Dam Safety Program |