North Lake B Dam

High HazardNot Rated ConditionEmergency Action Plan: Yes

Location

CountyHerkimer
Nearest CityAtwell
River/StreamTR-BLACK RIVER
Coordinates43.52333, -74.94333

Physical Characteristics

Dam TypeEarth
NID Height35 ft
Dam Height35 ft
Dam Length575 ft
Year Completed1850 (176 years old)

Storage & Hydraulics

NID Storage6,190 acre-ft
Max Storage6,190 acre-ft
Normal Storage5,480 acre-ft
Surface Area442 acres
Max Discharge5,590 cfs
Spillway TypeNone

Ownership & Safety

PurposeNavigation
OwnerNew York State Canal Corporation
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentNot Rated
Last Inspection04/10/2025
Emergency Action PlanYes

Identifiers

NID IDNY00326
Federal IDNY00326
More InfoState Dam Safety Program

Nearby Dams

North Lake C Dam 0.2 mi High North Lake A Dam (spillway) 0.3 mi Low South Lake Dam 3.5 mi High Sand Lake Dam 3.8 mi Low Second Bisby Lake Dam 4.5 mi Low Woodhull Lake Dam 4.7 mi High Otter Lake Dam 10.1 mi Low Finches Pond Upper Dam 10.5 mi Significant Maple Lake Dam 10.7 mi Low Finches Pond Lower Dam 10.8 mi Significant