US Bridges

HWY 100 over Beaver Creek

FairPosted for load

Multnomah County, Oregon · At Troutdale · Structure no. 04522 125 00174

Built
1912
113 years old
Condition
Fair
inspected July 2024
Type
Girder and Floorbeam System
Concrete
Length
40 ft
1 main span
Daily traffic
5,399
2020 count
Owner
County
County Highway Agency

About this bridge

HWY 100 over Beaver Creek is a concrete girder and floorbeam system carrying HWY 100 over Beaver Creek in Multnomah County, Oregon. It was built in 1912, so it is 113 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5,399 vehicles a day, roughly 7% of them trucks, projected to reach 6,021 by 2025. The structure is 40 ft (12.2 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHWY 100
CrossesBeaver Creek
LocationAt Troutdale
RouteCounty Highway 917
CountyMultnomah County
StateOregon
Coordinates45.53745, -122.37934
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating11.5 US tons
Inventory rating8.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,399 (2020)
Projected traffic6,021 by 2025
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$205,000
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 100 over Beaver Creek built?

It was built in 1912, making it 113 years old in 2025.

What condition is HWY 100 over Beaver Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does HWY 100 over Beaver Creek carry?

About 5,399 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is HWY 100 over Beaver Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns HWY 100 over Beaver Creek?

It is owned by the County Highway Agency.