US Bridges

James Road over Overflow Channel

Good

Thurston County, Washington · 1. S JCT SR12 · Structure no. 080419000000000

Built
1985
40 years old
Condition
Good
inspected March 2023
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
1,265
2020 count
Owner
County
County Highway Agency

About this bridge

James Road over Overflow Channel is a steel culvert carrying James Road over Overflow Channel in Thurston County, Washington. It was built in 1985, so it is 40 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 1,265 vehicles a day, roughly 10% of them trucks, projected to reach 1,956 by 2042. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesJames Road
CrossesOverflow Channel
Location1. S JCT SR12
RouteCounty Highway 12395
CountyThurston County
StateWashington
Coordinates46.80737, -123.09655
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.9 US tons
Inventory rating58 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,265 (2020)
Projected traffic1,956 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$296,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was James Road over Overflow Channel built?

It was built in 1985, making it 40 years old in 2025.

What condition is James Road over Overflow Channel 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 March 2023.

How much traffic does James Road over Overflow Channel carry?

About 1,265 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is James Road over Overflow Channel?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m).

Who owns James Road over Overflow Channel?

It is owned by the County Highway Agency.