US Bridges

South Fork Coppei over South Fork Coppei Creek

Good

Walla Walla County, Washington · 00.1 E of Walker RD · Structure no. 086305000000000

Built
1997
28 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
61
2020 count
Owner
County
County Highway Agency

About this bridge

South Fork Coppei over South Fork Coppei Creek is a concrete slab carrying South Fork Coppei over South Fork Coppei Creek in Walla Walla County, Washington. It was built in 1997, so it is 28 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 61 vehicles a day, roughly 10% of them trucks, projected to reach 111 by 2040. The structure is 28 ft (8.6 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSouth Fork Coppei
CrossesSouth Fork Coppei Creek
Location00.1 E of Walker RD
RouteCounty Highway 76830
Coordinates46.17897, -118.10672
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating52.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.6 m)
Longest span28 ft (8.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2020)
Projected traffic111 by 2040
Trucks10%
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

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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was South Fork Coppei over South Fork Coppei Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is South Fork Coppei over South Fork Coppei 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 September 2023.

How much traffic does South Fork Coppei over South Fork Coppei Creek carry?

About 61 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is South Fork Coppei over South Fork Coppei Creek?

The structure is 28 ft (8.6 m) long with a longest span of 28 ft (8.4 m) and a deck 28 ft wide.

Who owns South Fork Coppei over South Fork Coppei Creek?

It is owned by the County Highway Agency.