Development No. 1 Dam

High HazardFair ConditionEmergency Action Plan: Yes

Location

StateOregon
CountyMultnomah
Nearest CityTroutdale, OR
River/StreamBull Run River
Coordinates45.48180, -122.08230

Physical Characteristics

Dam TypeConcrete
NID Height200 ft
Dam Height200 ft
Dam Length970 ft
Year Completed1929 (97 years old)

Storage & Hydraulics

NID Storage33,760 acre-ft
Max Storage33,760 acre-ft
Normal Storage26,640 acre-ft
Surface Area386 acres
Drainage Area74 sq mi
Max Discharge21,000 cfs
Spillway TypeControlled

Ownership & Safety

PurposeWater Supply
OwnerCity of Portland Oregon
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentFair
Last Inspection05/24/2022
Emergency Action PlanYes

Identifiers

NID IDOR00327
Federal IDOR00327
More InfoState Dam Safety Program

Nearby Dams

Headworks Diversion Dam 4.1 mi Low Spillway Dam 4.3 mi High Wahkeena Rearing Reservoir 7.1 mi Low Osburn Reservoir 7.8 mi Low Lake Roslyn 8.6 mi Significant Duncan Creek Dam 9.5 mi Low Diack Reservoir 10.5 mi Low Sester, William H. Reservoir 1 11.4 mi Significant Isakson Reservoir 11.6 mi Low Bull Run Lake Dam 11.9 mi Low