US Bridges

S-Albro Ramp over Terrain

Fair

King County, Washington · 3.9 N JCT SR 900 · Structure no. 0007734E0000000

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
175 ft
3 main spans
Daily traffic
8,293
2012 count
Owner
State
State Highway Agency

About this bridge

S-Albro Ramp over Terrain is a concrete continuous slab carrying S-Albro Ramp over Terrain in King County, Washington. It was built in 1966, so it is 59 years old, older than the Washington average of 49.8 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 8,293 vehicles a day, roughly 5% of them trucks, projected to reach 13,866 by 2036. The structure is 175 ft (53.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesS-Albro Ramp
CrossesTerrain
Location3.9 N JCT SR 900
RouteInterstate 5
Coordinates47.55067, -122.31617
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.3 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length175 ft (53.4 m)
Longest span63 ft (19.2 m)
Deck width26 ft (7.8 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,293 (2012)
Projected traffic13,866 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-Albro Ramp over Terrain built?

It was built in 1966, making it 59 years old in 2025.

What condition is S-Albro Ramp over Terrain 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 April 2023.

How much traffic does S-Albro Ramp over Terrain carry?

About 8,293 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is S-Albro Ramp over Terrain?

The structure is 175 ft (53.4 m) long with a longest span of 63 ft (19.2 m) and a deck 26 ft wide.

Who owns S-Albro Ramp over Terrain?

It is owned by the State Highway Agency.