Lower Great Falls

Significant HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateNew Hampshire
CountyStrafford
Nearest CityRollinsford
River/StreamSalmon Falls River
Coordinates43.25440, -70.84460

Physical Characteristics

Dam TypeMasonry
NID Height36 ft
Dam Height36 ft
Dam Length270 ft
Year Completed1984 (42 years old)

Storage & Hydraulics

NID Storage472 acre-ft
Max Storage472 acre-ft
Normal Storage472 acre-ft
Surface Area32 acres
Drainage Area220 sq mi
Max Discharge8,460 cfs
Spillway TypeControlled

Ownership & Safety

PurposeHydroelectric
Owner TypeNot Listed
Hazard ClassificationSignificant
Condition AssessmentSatisfactory
Last Inspection05/19/2022
Emergency Action PlanYes

Identifiers

NID IDNH00126
Federal IDNH00126
More InfoState Dam Safety Program

Nearby Dams

Somersworth 1.2 mi Significant Rollinsford 1.8 mi Significant South Berwick 2.6 mi Low South Berwick 3.0 mi Low Rocky Gorge Upper 3.4 mi Low Beaver Dam Pond 3.8 mi Significant Cocheco Falls 4.3 mi Significant Cider Mill 4.5 mi Low Watson 4.8 mi Low Hatfield Lake 5.5 mi Low