US Bridges

Chamber Way over Bn RR & N Natl Ave

PoorPosted for load

Lewis County, Washington · 0.1 E of Interstate 5 · Structure no. 085516000000000

Built
1952
73 years old
Condition
Poor
inspected September 2024
Type
Girder and Floorbeam System
Steel
Length
376 ft
1 main span
Daily traffic
13,223
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chamber Way over Bn RR & N Natl Ave is a steel girder and floorbeam system carrying Chamber Way over Bn RR & N Natl Ave in Lewis County, Washington. It was built in 1952, so it is 73 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 13,223 vehicles a day, roughly 5% of them trucks, projected to reach 15,509 by 2042. The structure is 376 ft (114.6 m) long and 36 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesChamber Way
CrossesBn RR & N Natl Ave
Location0.1 E of Interstate 5
RouteCity Street 500
Coordinates46.67375, -122.97153
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating19 US tons
Inventory rating14 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+6 approach)
Design loadUnknown
Structure length376 ft (114.6 m)
Longest span119 ft (36.3 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,223 (2022)
Projected traffic15,509 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$7.9 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Chamber Way over Bn RR & N Natl Ave built?

It was built in 1952, making it 73 years old in 2025.

What condition is Chamber Way over Bn RR & N Natl Ave in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Chamber Way over Bn RR & N Natl Ave carry?

About 13,223 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Chamber Way over Bn RR & N Natl Ave?

The structure is 376 ft (114.6 m) long with a longest span of 119 ft (36.3 m) and a deck 36 ft wide.

Who owns Chamber Way over Bn RR & N Natl Ave?

It is owned by the City or Municipal Highway Agency.