Hiram M. Chittenden Locks And Dam

High HazardNot Available ConditionEmergency Action Plan: Yes

Location

StateWashington
CountyKing
Nearest CitySEATTLE
River/StreamCEDAR RIVER, SAMMAMISH RIVER
Coordinates47.66529, -122.39725

Physical Characteristics

Dam TypeGravity
NID Height63 ft
Dam Length240 ft
Year Completed1916 (110 years old)

Storage & Hydraulics

NID Storage458,000 acre-ft
Max Storage458,000 acre-ft
Normal Storage458,000 acre-ft
Surface Area25,000 acres
Drainage Area607 sq mi
Max Discharge16,000 cfs
Spillway TypeControlled

Ownership & Safety

PurposeNavigation
OwnerUSACE - Seattle District
Owner TypeFederal
Hazard ClassificationHigh
Condition AssessmentNot Available
Last Inspection03/10/2022
Emergency Action PlanYes

Identifiers

NID IDWA00301
Federal IDWA00301
More InfoState Dam Safety Program

Nearby Dams

Roosevelt Reservoir 4.0 mi High Seattle City Volunteer Park Reservoir 4.5 mi High Bitter Lake Reservoir 5.1 mi High Boeing Creek M1 Detention Dam 6.2 mi High Boeing Creek Park North Pond Dam 6.4 mi High Koura Dam 6.8 mi High Southwest Genesee Street Detention Dam 7.1 mi High Macs Pond Dam 7.3 mi Low Lake Forest Park Reservoir 9.1 mi High Cedar Way Stormwater Detention Dam 9.4 mi High