West Lake Dam (mahaska Co) is an earth dam located in Mahaska County, Iowa, built in 1989. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 665 ft long, taller than 74% 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 West Lake Dam (mahaska Co)
The primary purpose of West Lake Dam (mahaska Co) is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by West Lake Development Corp (private). It impounds the Tr-muchakinock Creek near Beacon.
The dam stands 32 feet tall and stretches 665 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 496 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1989, the structure is 37 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/04/2022.
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Location
| State | Iowa |
| County | Mahaska |
| Nearest City | Beacon |
| River/Stream | Tr-muchakinock Creek |
| Coordinates | 41.31460, -92.71090 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 665 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 496 acre-ft |
| Max Storage | 496 acre-ft |
| Normal Storage | 214 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | West Lake Development Corp |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/04/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02483 |
| Federal ID | IA02483 |
| More Info | State Dam Safety Program |