US Bridges

SR 503 over Jim Creek

Poor

Cowlitz County, Washington · 8.2 N JCT SR 503 Spur · Structure no. 0002912A0000000

Built
1945
80 years old
Condition
Poor
inspected April 2024
Type
Arch - Deck
Concrete
Length
308 ft
1 main span
Daily traffic
1,969
2023 count
Owner
State
State Highway Agency

About this bridge

SR 503 over Jim Creek is a concrete arch - deck carrying SR 503 over Jim Creek in Cowlitz County, Washington. It was built in 1945, so it is 80 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 3 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.

It carries about 1,969 vehicles a day, roughly 10% of them trucks, projected to reach 1,656 by 2039. The structure is 308 ft (93.9 m) long and 30 ft wide. If it were closed, the detour would be 67.7 mi (109 km).

CarriesSR 503
CrossesJim Creek
Location8.2 N JCT SR 503 Spur
RouteState Highway 503
Coordinates45.99583, -122.51628
Functional classRural Minor 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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating15.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+6 approach)
Design loadH 15
Structure length308 ft (93.9 m)
Longest span179 ft (54.6 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,969 (2023)
Projected traffic1,656 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed67.7 mi (109 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 503 over Jim Creek built?

It was built in 1945, making it 80 years old in 2025.

What condition is SR 503 over Jim Creek 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 April 2024.

How much traffic does SR 503 over Jim Creek carry?

About 1,969 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SR 503 over Jim Creek?

The structure is 308 ft (93.9 m) long with a longest span of 179 ft (54.6 m) and a deck 30 ft wide.

Who owns SR 503 over Jim Creek?

It is owned by the State Highway Agency.