US Bridges

Truax Road over South Fork Rock Creek

Fair

Spokane County, Washington · 0.6 W Starr Road · Structure no. 084800000000000

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
37 ft
1 main span
Daily traffic
343
2020 count
Owner
County
County Highway Agency

About this bridge

Truax Road over South Fork Rock Creek is a concrete slab carrying Truax Road over South Fork Rock Creek in Spokane County, Washington. It was built in 1964, so it is 61 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 343 vehicles a day, roughly 29% of them trucks, projected to reach 493 by 2042. The structure is 37 ft (11.3 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesTruax Road
CrossesSouth Fork Rock Creek
Location0.6 W Starr Road
RouteCounty Highway 4842
CountySpokane County
StateWashington
Coordinates47.35141, -117.07866
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic343 (2020)
Projected traffic493 by 2042
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Truax Road over South Fork Rock Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Truax Road over South Fork Rock Creek 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 July 2023.

How much traffic does Truax Road over South Fork Rock Creek carry?

About 343 vehicles per day (2020 count), of which roughly 29% are trucks.

How long is Truax Road over South Fork Rock Creek?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns Truax Road over South Fork Rock Creek?

It is owned by the County Highway Agency.