Ackley Lake Dam is an earth dam located in Henry County, Missouri, built in 1972. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 340 ft long, taller than 68% 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 Ackley Lake Dam
The primary purpose of Ackley Lake 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 Mack Rucker (private). It impounds the Tr-otter Creek near Warsaw.
The dam stands 30 feet tall and stretches 340 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 91 acre-feet, and collects water from a drainage area of 121 square miles. Completed in 1972, the structure is well into its service life at over 50 years old.
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 | Missouri |
| County | Henry |
| Nearest City | Warsaw |
| River/Stream | Tr-otter Creek |
| Coordinates | 38.21872, -93.70455 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 29 ft |
| Dam Length | 340 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 91 acre-ft |
| Max Storage | 91 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 121 sq mi |
| Max Discharge | 61 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Mack Rucker |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO20259 |
| Federal ID | MO20259 |
| More Info | State Dam Safety Program |