Tomhannock Reservoir Dam

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

CountyRensselaer
Nearest CityPittstown & Schaghticoke
River/StreamTOMHANNOCK CREEK
Coordinates42.87056, -73.58333

Physical Characteristics

Dam TypeConcrete
NID Height68 ft
Dam Height68 ft
Dam Length700 ft
Year Completed1905 (121 years old)

Storage & Hydraulics

NID Storage56,600 acre-ft
Max Storage56,600 acre-ft
Normal Storage39,521 acre-ft
Surface Area1,742 acres
Drainage Area66 sq mi
Spillway TypeUncontrolled

Ownership & Safety

PurposeWater Supply
OwnerCITY OF TROY
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection01/09/2025
Emergency Action PlanYes

Identifiers

NID IDNY00117
Federal IDNY00117
More InfoState Dam Safety Program

Nearby Dams

Schaghticoke 1.6 mi Low James Thompson 2.6 mi Low Deep Kill Dam 3.5 mi Low Mechanicville 4.7 mi Significant Johnsonville 5.1 mi High Lock C-1 Dam At Waterford 5.1 mi Low Upper Mechanicville 5.6 mi Significant Lock 4 - Stillwater 5.8 mi Significant Lock E-3 Spillway Bypass Dam 7.3 mi High Lock E-4 Embankment Dam 7.5 mi High