US Bridges

US 26 (hwy 026) over Alder Creek

Fair

Clackamas County, Oregon · 8.0 MI E of Sandy · Structure no. 19957 026 03324

Built
2005
20 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
161 ft
1 main span
Daily traffic
16,683
2022 count
Owner
State
State Highway Agency

About this bridge

US 26 (hwy 026) over Alder Creek is a prestressed concrete stringer/multi-beam or girder carrying US 26 (hwy 026) over Alder Creek in Clackamas County, Oregon. It was built in 2005, so it is 20 years old, younger 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.

It carries about 16,683 vehicles a day, roughly 17% of them trucks, projected to reach 22,200 by 2042. The structure is 161 ft (49.1 m) long and 87 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesUS 26 (hwy 026)
CrossesAlder Creek
Location8.0 MI E of Sandy
RouteU.S. Route 26
CountyClackamas County
StateOregon
Coordinates45.37748, -122.10054
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length161 ft (49.1 m)
Longest span161 ft (49.1 m)
Deck width87 ft (26.4 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,683 (2022)
Projected traffic22,200 by 2042
Trucks17%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 26 (hwy 026) over Alder Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is US 26 (hwy 026) over Alder 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 May 2023.

How much traffic does US 26 (hwy 026) over Alder Creek carry?

About 16,683 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 26 (hwy 026) over Alder Creek?

The structure is 161 ft (49.1 m) long with a longest span of 161 ft (49.1 m) and a deck 87 ft wide.

Who owns US 26 (hwy 026) over Alder Creek?

It is owned by the State Highway Agency.