US Bridges

Allen Street over Cowlitz R Bnrr City ST

Fair

Cowlitz County, Washington · Allen ST over Cowlitz R · Structure no. 086506000000000

Built
2000
25 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,115 ft
7 main spans
Daily traffic
10,700
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Allen Street over Cowlitz R Bnrr City ST is a prestressed concrete continuous stringer/multi-beam or girder carrying Allen Street over Cowlitz R Bnrr City ST in Cowlitz County, Washington. It was built in 2000, so it is 25 years old, younger 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 10,700 vehicles a day, roughly 10% of them trucks, projected to reach 14,100 by 2039. The structure is 1,115 ft (339.9 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesAllen Street
CrossesCowlitz R Bnrr City ST
LocationAllen ST over Cowlitz R
RouteCity Street 2018
CountyCowlitz County
StateWashington
Coordinates46.14544, -122.91556
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHL 93
Structure length1,115 ft (339.9 m)
Longest span167 ft (50.9 m)
Deck width68 ft (20.7 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic10,700 (2019)
Projected traffic14,100 by 2039
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$37.1 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Allen Street over Cowlitz R Bnrr City ST built?

It was built in 2000, making it 25 years old in 2025.

What condition is Allen Street over Cowlitz R Bnrr City 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 August 2024.

How much traffic does Allen Street over Cowlitz R Bnrr City ST carry?

About 10,700 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Allen Street over Cowlitz R Bnrr City ST?

The structure is 1,115 ft (339.9 m) long with a longest span of 167 ft (50.9 m) and a deck 68 ft wide.

Who owns Allen Street over Cowlitz R Bnrr City ST?

It is owned by the City or Municipal Highway Agency.