US Bridges

I-5 over Orillia Rd/S 188th ST

Fair

King County, Washington · 3.1 N JCT SR 516 · Structure no. 0007090B0000000

Built
1963
62 years old, rebuilt 1994
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
195 ft
3 main spans
Daily traffic
100,213
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Orillia Rd/S 188th ST is a prestressed concrete stringer/multi-beam or girder carrying I-5 over Orillia Rd/S 188th ST in King County, Washington. It was built in 1963 and reconstructed in 1994, so it is 62 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 100,213 vehicles a day, roughly 7% of them trucks, projected to reach 143,843 by 2039. The structure is 195 ft (59.4 m) long and 79 ft wide.

CarriesI-5
CrossesOrillia Rd/S 188th ST
Location3.1 N JCT SR 516
RouteInterstate 5
Coordinates47.43119, -122.27144
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length195 ft (59.4 m)
Longest span82 ft (25 m)
Deck width79 ft (24.1 m)
Roadway width77 ft (23.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100,213 (2023)
Projected traffic143,843 by 2039
Trucks7%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$7.3 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over Orillia Rd/S 188th ST built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1994.

What condition is I-5 over Orillia Rd/S 188th ST 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 2023.

How much traffic does I-5 over Orillia Rd/S 188th ST carry?

About 100,213 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-5 over Orillia Rd/S 188th ST?

The structure is 195 ft (59.4 m) long with a longest span of 82 ft (25 m) and a deck 79 ft wide.

Who owns I-5 over Orillia Rd/S 188th ST?

It is owned by the State Highway Agency.