Waldo Lake Dam

Waldo Lake Dam is an earth dam located in Plymouth County, Massachusetts, built in 1936. It carries a High hazard potential classification and has a fair condition assessment.

About Waldo Lake Dam

The primary purpose of Waldo Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Brockton (local government). It impounds the Salisbury Brook And Salisbury Plain River near Brockton.

The dam stands 18 feet tall and stretches 380 feet across, creates a reservoir covering 70 acres, has a maximum storage capacity of 750 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1936, the structure is well-established, with more than 75 years 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 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 11/07/2022.

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.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateMassachusetts
CountyPlymouth
Nearest CityBrockton
River/StreamSalisbury Brook And Salisbury Plain River
Coordinates42.10555, -71.04779

Physical Characteristics

Dam TypeEarth
NID Height18 ft
Dam Length380 ft
Year Completed1936 (90 years old)

Storage & Hydraulics

NID Storage750 acre-ft
Max Storage750 acre-ft
Normal Storage284 acre-ft
Surface Area70 acres
Drainage Area3 sq mi
Max Discharge10 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerCity of Brockton
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection11/07/2022
Emergency Action PlanYes

Identifiers

NID IDMA00426
Federal IDMA00426
More InfoState Dam Safety Program

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