US Bridges

Tumwater Blvd over I-5

Good

Thurston County, Washington · 2.0 N JCT SR 121 · Structure no. 0012994A0000000

Built
1986
39 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
198 ft
2 main spans
Daily traffic
13,762
2012 count
Owner
State
State Highway Agency

About this bridge

Tumwater Blvd over I-5 is a prestressed concrete continuous stringer/multi-beam or girder carrying Tumwater Blvd over I-5 in Thurston County, Washington. It was built in 1986, so it is 39 years old, younger 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 13,762 vehicles a day, roughly 5% of them trucks, projected to reach 21,689 by 2036. The structure is 198 ft (60.4 m) long and 55 ft wide.

CarriesTumwater Blvd
CrossesI-5
Location2.0 N JCT SR 121
RouteCity Street 0
Coordinates46.981, -122.92728
Functional classUrban Minor Arterial

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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length198 ft (60.4 m)
Longest span99 ft (30.2 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,762 (2012)
Projected traffic21,689 by 2036
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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$5.1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Tumwater Blvd over I-5 built?

It was built in 1986, making it 39 years old in 2025.

What condition is Tumwater Blvd over I-5 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 June 2024.

How much traffic does Tumwater Blvd over I-5 carry?

About 13,762 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Tumwater Blvd over I-5?

The structure is 198 ft (60.4 m) long with a longest span of 99 ft (30.2 m) and a deck 55 ft wide.

Who owns Tumwater Blvd over I-5?

It is owned by the State Highway Agency.