Cascade Lake Dam

High HazardPoor ConditionEmergency Action Plan: Yes

Location

StateWashington
CountySan Juan
Nearest CityRosario
River/StreamTr-Cascade Bay
Coordinates48.65023, -122.86550

Physical Characteristics

Dam TypeArch
NID Height21 ft
Dam Length127 ft
Year Completed1915 (111 years old)

Storage & Hydraulics

NID Storage2,670 acre-ft
Max Storage2,670 acre-ft
Normal Storage1,700 acre-ft
Surface Area170 acres
Drainage Area3 sq mi
Max Discharge130 cfs

Ownership & Safety

PurposeHydroelectric
OwnerOrcas Water Holdings LLC
Owner TypePrivate
Hazard ClassificationHigh
Condition AssessmentPoor
Last Inspection06/06/2023
Emergency Action PlanYes

Identifiers

NID IDWA00281
Federal IDWA00281
More InfoState Dam Safety Program

Nearby Dams

Ayer Reservoir Dam 1.9 mi Low Martins Lake Dam 2.2 mi Low Mountain Lake Dam 2.4 mi High Boyd Lower Reservoir Dam 2.5 mi High Buck Mountain Reservoir Dam No 1 2.6 mi High Buck Mountain Reservoir Dam No 2 2.7 mi High Buck Mountain Reservoir Dam No 3 2.7 mi High Fowler Reservoir Dam 3.6 mi Low Utter Dam 4.4 mi Low Helsell Dam 6.3 mi Low