Hopkinton Reservoir Dam

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateMassachusetts
CountyMiddlesex
Nearest CityAshland
River/StreamIndian Brook
Coordinates42.25854, -71.51290

Physical Characteristics

Dam TypeEarth
NID Height58 ft
Dam Length1,616 ft
Year Completed1891 (135 years old)

Storage & Hydraulics

NID Storage6,850 acre-ft
Max Storage6,850 acre-ft
Normal Storage4,500 acre-ft
Surface Area192 acres
Drainage Area6 sq mi
Max Discharge1,555 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerMA Department of Conservation & Recreation
Owner TypeState
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection05/01/2024
Emergency Action PlanYes

Identifiers

NID IDMA00437
Federal IDMA00437
More InfoState Dam Safety Program

Nearby Dams

Hopkinton State Park Swimming Pool Dam 0.3 mi High Sudbury River Dam 1.8 mi Low Mill Pond Dam 2.4 mi High Ashland Reservoir Dam 2.8 mi High Whitehall Upper Pond Dam 3.0 mi Significant Whitehall Reservoir Distribution Dam 3.1 mi Significant Whitehall Reservoir Dam 3.1 mi Significant Grist Mill Dam 3.2 mi Low Bloods Pond Dam 3.4 mi Significant Sudbury Reservoir Dam 3.6 mi High