US Bridges

US 101 over Perry CR

Fair

Thurston County, Washington · 0.6 S JCT SR 8 · Structure no. 0005728A0000000

Built
1957
68 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
26,624
2023 count
Owner
State
State Highway Agency

About this bridge

US 101 over Perry CR is a concrete continuous box beam or girders - multiple carrying US 101 over Perry CR in Thurston County, Washington. It was built in 1957, so it is 68 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 26,624 vehicles a day, roughly 6% of them trucks, projected to reach 38,765 by 2039. The structure is 102 ft (31.1 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 101
CrossesPerry CR
Location0.6 S JCT SR 8
RouteU.S. Route 101
CountyThurston County
StateWashington
Coordinates47.05219, -123.00208
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating73 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span66 ft (20.1 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,624 (2023)
Projected traffic38,765 by 2039
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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$2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 101 over Perry CR built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 101 over Perry CR 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 October 2023.

How much traffic does US 101 over Perry CR carry?

About 26,624 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 101 over Perry CR?

The structure is 102 ft (31.1 m) long with a longest span of 66 ft (20.1 m) and a deck 34 ft wide.

Who owns US 101 over Perry CR?

It is owned by the State Highway Agency.