West Lake Dam
West Lake Dam is an earth dam located in Clarke County, Iowa, built in 1935. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About West Lake Dam
The primary purpose of West Lake Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City Of Osceola Water Utilities Board (local government). It impounds the Tr-south Squaw Creek near Jamison.
The dam stands 58 feet tall and stretches 1,275 feet across, creates a reservoir covering 306 acres, has a maximum storage capacity of 9,675 acre-feet, and collects water from a drainage area of 9 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 08/29/2022.
At 58 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Iowa |
| County | Clarke |
| Nearest City | Jamison |
| River/Stream | Tr-south Squaw Creek |
| Coordinates | 41.04080, -93.80570 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 58 ft |
| Dam Height | 58 ft |
| Dam Length | 1,275 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 9,675 acre-ft |
| Max Storage | 9,675 acre-ft |
| Normal Storage | 4,195 acre-ft |
| Surface Area | 306 acres |
| Drainage Area | 9 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Osceola Water Utilities Board |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/29/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00213 |
| Federal ID | IA00213 |
| More Info | State Dam Safety Program |