US Bridges

SR 504 over Maratta Creek

Good

Cowlitz County, Washington · 20.6 E JCT SR 504 SP · Structure no. 0013731C0000000

Built
1992
33 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
495 ft
3 main spans
Daily traffic
585
2023 count
Owner
State
State Highway Agency

About this bridge

SR 504 over Maratta Creek is a steel continuous stringer/multi-beam or girder carrying SR 504 over Maratta Creek in Cowlitz County, Washington. It was built in 1992, so it is 33 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 585 vehicles a day, roughly 7% of them trucks, projected to reach 801 by 2039. The structure is 495 ft (150.9 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSR 504
CrossesMaratta Creek
Location20.6 E JCT SR 504 SP
RouteState Highway 504
Coordinates46.31061, -122.28567
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than 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 rating88 US tons
Inventory rating53 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length495 ft (150.9 m)
Longest span195 ft (59.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic585 (2023)
Projected traffic801 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 504 over Maratta Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is SR 504 over Maratta Creek 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 May 2023.

How much traffic does SR 504 over Maratta Creek carry?

About 585 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 504 over Maratta Creek?

The structure is 495 ft (150.9 m) long with a longest span of 195 ft (59.4 m) and a deck 35 ft wide.

Who owns SR 504 over Maratta Creek?

It is owned by the State Highway Agency.