US Bridges

I-5 over Hylebos Creek

Good

Pierce County, Washington · 1.7 N JCT SR 99 · Structure no. 0006379D0000000

Built
1960
65 years old, rebuilt 2009
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
322 ft
9 main spans
Daily traffic
96,536
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 over Hylebos Creek is a concrete continuous slab carrying I-5 over Hylebos Creek in Pierce County, Washington. It was built in 1960 and reconstructed in 2009, so it is 65 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 96,536 vehicles a day, roughly 7% of them trucks, projected to reach 141,479 by 2039. The structure is 322 ft (98.1 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-5
CrossesHylebos Creek
Location1.7 N JCT SR 99
RouteInterstate 5
Coordinates47.252, -122.33278
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length322 ft (98.1 m)
Longest span40 ft (12.2 m)
Deck width82 ft (24.9 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96,536 (2023)
Projected traffic141,479 by 2039
Trucks7%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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$12.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 over Hylebos Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is I-5 over Hylebos Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does I-5 over Hylebos Creek carry?

About 96,536 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-5 over Hylebos Creek?

The structure is 322 ft (98.1 m) long with a longest span of 40 ft (12.2 m) and a deck 82 ft wide.

Who owns I-5 over Hylebos Creek?

It is owned by the State Highway Agency.