Bird Pond Dam

About Bird Pond Dam

The primary purpose of Bird Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Last Known Owner - Lloyd Marded (private). It impounds the Neponset River near Walpole.

The dam stands 19 feet tall and stretches 435 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 185 acre-feet, and collects water from a drainage area of 25 square miles. Completed in 1800, the structure is one of the older dams in the region, with over a century and a half of service.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 05/11/2023.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Massachusetts dam safety program can provide more specific information about emergency planning for this structure.

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