US Bridges

North Fork Coppei over North Fork Coppei Creek

Good

Walla Walla County, Washington · 3.872 SE Coppei RD · Structure no. 086308000000000

Built
1997
28 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
22
2021 count
Owner
County
County Highway Agency

About this bridge

North Fork Coppei over North Fork Coppei Creek is a concrete slab carrying North Fork Coppei over North 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 22 vehicles a day, roughly 10% of them trucks, projected to reach 25 by 2043. The structure is 28 ft (8.5 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNorth Fork Coppei
CrossesNorth Fork Coppei Creek
Location3.872 SE Coppei RD
RouteCounty Highway 78230
Coordinates46.15897, -118.05031
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 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 rating84.3 US tons
Inventory rating65 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22 (2021)
Projected traffic25 by 2043
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 North Fork Coppei over North Fork Coppei Creek built?

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

What condition is North Fork Coppei over North 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 North Fork Coppei over North Fork Coppei Creek carry?

About 22 vehicles per day (2021 count), of which roughly 10% are trucks.

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

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 24 ft wide.

Who owns North Fork Coppei over North Fork Coppei Creek?

It is owned by the County Highway Agency.