US Bridges

South Toutle RD over South Toutle River

Fair

Cowlitz County, Washington · 1.16 E SR 504 (mp 10.55) · Structure no. 083925000000000

Built
1971
54 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
291 ft
3 main spans
Daily traffic
1,400
2019 count
Owner
County
County Highway Agency

About this bridge

South Toutle RD over South Toutle River is a steel continuous stringer/multi-beam or girder carrying South Toutle RD over South Toutle River in Cowlitz County, Washington. It was built in 1971, so it is 54 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 1,400 vehicles a day, roughly 7% of them trucks, projected to reach 1,500 by 2040. The structure is 291 ft (88.7 m) long and 37 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSouth Toutle RD
CrossesSouth Toutle River
Location1.16 E SR 504 (mp 10.55)
RouteCounty Highway 51700
Coordinates46.32389, -122.70917
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating31.4 US tons
Inventory rating24.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length291 ft (88.7 m)
Longest span200 ft (61 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2019)
Projected traffic1,500 by 2040
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$4.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South Toutle RD over South Toutle River built?

It was built in 1971, making it 54 years old in 2025.

What condition is South Toutle RD over South Toutle River 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 March 2023.

How much traffic does South Toutle RD over South Toutle River carry?

About 1,400 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is South Toutle RD over South Toutle River?

The structure is 291 ft (88.7 m) long with a longest span of 200 ft (61 m) and a deck 37 ft wide.

Who owns South Toutle RD over South Toutle River?

It is owned by the County Highway Agency.