US Bridges

Gish Road over S Fk Newaukum River

Fair

Lewis County, Washington · 4.0 W Onalaska · Structure no. 086240000000000

Built
1996
29 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
170 ft
2 main spans
Daily traffic
495
2022 count
Owner
County
County Highway Agency

About this bridge

Gish Road over S Fk Newaukum River is a prestressed concrete continuous stringer/multi-beam or girder carrying Gish Road over S Fk Newaukum River in Lewis County, Washington. It was built in 1996, so it is 29 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 495 vehicles a day, roughly 18% of them trucks, projected to reach 895 by 2042. The structure is 170 ft (51.8 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesGish Road
CrossesS Fk Newaukum River
Location4.0 W Onalaska
RouteCounty Highway 45010
CountyLewis County
StateWashington
Coordinates46.57515, -122.79282
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length170 ft (51.8 m)
Longest span85 ft (25.9 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic495 (2022)
Projected traffic895 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gish Road over S Fk Newaukum River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Gish Road over S Fk Newaukum River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.

How much traffic does Gish Road over S Fk Newaukum River carry?

About 495 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Gish Road over S Fk Newaukum River?

The structure is 170 ft (51.8 m) long with a longest span of 85 ft (25.9 m) and a deck 31 ft wide.

Who owns Gish Road over S Fk Newaukum River?

It is owned by the County Highway Agency.