Beckman Lake
Beckman Lake is an earth dam located in Green County, Wisconsin, built in 1965. It carries a Significant hazard potential classification and has a fair condition assessment.
About Beckman Lake
The primary purpose of Beckman Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Wisconsin Department Of Natural Resources (state). It impounds the Zander Creek near Browntown.
The dam stands 21 feet tall and stretches 4,000 feet across, creates a reservoir covering 73 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1965, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/26/2022.
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Location
| State | Wisconsin |
| County | Green |
| Nearest City | Browntown |
| River/Stream | Zander Creek |
| Coordinates | 42.58188, -89.77454 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 4,000 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Normal Storage | 514 acre-ft |
| Surface Area | 73 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,310 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Wisconsin Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 08/26/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WI00998 |
| Federal ID | WI00998 |
| More Info | State Dam Safety Program |