Mamaroneck Reservoir Dam

High HazardPoor ConditionEmergency Action Plan: Yes

Location

CountyWestchester
Nearest CityMamaroneck
River/StreamMAMARONECK RIVER
Coordinates40.96806, -73.73889

Physical Characteristics

Dam TypeConcrete
NID Height19 ft
Dam Height19 ft
Dam Length185 ft
Year Completed1928 (98 years old)

Storage & Hydraulics

NID Storage241 acre-ft
Max Storage241 acre-ft
Normal Storage18 acre-ft
Surface Area18 acres
Drainage Area15 sq mi
Max Discharge4,240 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFlood Risk Reduction
OwnerVILLAGE OF MAMARONECK;Westchester Joint Waterworks
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentPoor
Last Inspection03/21/2024
Emergency Action PlanYes

Identifiers

NID IDNY00111
Federal IDNY00111
More InfoState Dam Safety Program

Nearby Dams

Larchmont Dam 2.1 mi Significant Larchmont Water Company Dam #2 2.1 mi High Carpenter Pond Dam 2.2 mi Significant Hampshire Country Club Dam 2.5 mi Low Murray Hill Estates Dam 2.8 mi Significant New Rochelle Reservoir #1 Dam 3.2 mi High Beechmont Lake Dam 3.2 mi Significant Paine Lake Dam 3.6 mi Significant Bowman Ave Dam 3.6 mi Significant New Rochelle Reservoir #3 Dam 3.7 mi High