Blackwater Dam - Dodge Estate Dike

High HazardNot Available ConditionEmergency Action Plan: Yes

Location

StateNew Hampshire
CountyMerrimack
Nearest CityWEBSTER
River/StreamBLACKWATER RIVER
Coordinates43.31472, -71.73357

Physical Characteristics

Dam TypeGravity
NID Height18 ft
Dam Height18 ft
Dam Length400 ft
Year Completed1941 (85 years old)

Storage & Hydraulics

NID Storage93,400 acre-ft
Max Storage93,400 acre-ft
Surface Area1 acres
Drainage Area128 sq mi
Max Discharge42,800 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFlood Risk Reduction
OwnerUSACE - New England District
Owner TypeFederal
Hazard ClassificationHigh
Condition AssessmentNot Available
Last Inspection10/25/2022
Emergency Action PlanYes

Identifiers

NID IDNH03847
Federal IDNH00001S001
More InfoState Dam Safety Program

Nearby Dams

Blackwater Dam 0.6 mi High Winnipocket Lake Dam 1.0 mi Low Knight Meadow Pond Dam 1.2 mi Low Blackwater Dam - Little Hill Dike 2.5 mi High Walker Pond Dam 2.8 mi Undetermined Pillsbury Lake Dam 3.6 mi Low Transfer Station Lagoons Dam 5.0 mi Significant Flagpole Pond Dike 5.1 mi Low Flagpole Pond Dam 5.4 mi Low Hopkinton 6.5 mi Low