US Bridges

Carpenter RD over I-5

Fair

Thurston County, Washington · 6.4 N JCT US 101 · Structure no. 0008100C0000000

Built
1967
58 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
356 ft
4 main spans
Daily traffic
4,466
2002 count
Owner
State
State Highway Agency

About this bridge

Carpenter RD over I-5 is a prestressed concrete stringer/multi-beam or girder carrying Carpenter RD over I-5 in Thurston County, Washington. It was built in 1967, so it is 58 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 4,466 vehicles a day, roughly 2% of them trucks, projected to reach 8,110 by 2036. The structure is 356 ft (108.5 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCarpenter RD
CrossesI-5
Location6.4 N JCT US 101
RouteCounty Highway 0
CountyThurston County
StateWashington
Coordinates47.05792, -122.79681
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length356 ft (108.5 m)
Longest span108 ft (32.9 m)
Deck width34 ft (10.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,466 (2002)
Projected traffic8,110 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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$4.7 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Carpenter RD over I-5 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Carpenter RD over I-5 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 November 2023.

How much traffic does Carpenter RD over I-5 carry?

About 4,466 vehicles per day (2002 count), of which roughly 2% are trucks.

How long is Carpenter RD over I-5?

The structure is 356 ft (108.5 m) long with a longest span of 108 ft (32.9 m) and a deck 34 ft wide.

Who owns Carpenter RD over I-5?

It is owned by the State Highway Agency.