US Bridges

Centralia Alpha RD over Salzer Cr.

Good

Lewis County, Washington · 1. Se.Centralia · Structure no. 081836000000000

Built
1983
42 years old
Condition
Good
inspected January 2023
Type
Slab
Concrete Continuous
Length
69 ft
3 main spans
Daily traffic
1,732
2022 count
Owner
County
County Highway Agency

About this bridge

Centralia Alpha RD over Salzer Cr. is a concrete continuous slab carrying Centralia Alpha RD over Salzer Cr. in Lewis County, Washington. It was built in 1983, so it is 42 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 1,732 vehicles a day, roughly 12% of them trucks, projected to reach 3,129 by 2042. The structure is 69 ft (21 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCentralia Alpha RD
CrossesSalzer Cr.
Location1. Se.Centralia
RouteCounty Highway 15052
Coordinates46.69915, -122.92928
Functional classRural Major Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length69 ft (21 m)
Longest span27 ft (8.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,732 (2022)
Projected traffic3,129 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$852,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Centralia Alpha RD over Salzer Cr. built?

It was built in 1983, making it 42 years old in 2025.

What condition is Centralia Alpha RD over Salzer Cr. 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 January 2023.

How much traffic does Centralia Alpha RD over Salzer Cr. carry?

About 1,732 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Centralia Alpha RD over Salzer Cr.?

The structure is 69 ft (21 m) long with a longest span of 27 ft (8.2 m) and a deck 31 ft wide.

Who owns Centralia Alpha RD over Salzer Cr.?

It is owned by the County Highway Agency.