Lake Mattawa South Dam

Franklin County, Massachusetts (near Orange)

River/Stream: Middle Branch of Swift River

Significant Hazard

Failure could cause economic loss or disruption

Key Facts

Dam Type
Earth
Height
10 ft
Dam Length
287 ft
Reservoir Storage
928 acre-ft
Year Completed
1893
Primary Purpose
Recreation
Owner Type
Local Government
Max Discharge
419 cfs

Condition Assessment

PoorLast inspected: 2021-11-19

Hazard Classification: Significant — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Poor — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
MA00502
State
Massachusetts (MA)
Coordinates
42.56281, -72.31671
Age
133 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.