US Bridges

Old SR 26 RD over Palouse River

Fair

Adams County, Washington · 00.19 MI S SR26 · Structure no. 084426000000000

Built
1941
84 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Concrete
Length
337 ft
7 main spans
Daily traffic
53
2018 count
Owner
County
County Highway Agency

About this bridge

Old SR 26 RD over Palouse River is a concrete stringer/multi-beam or girder carrying Old SR 26 RD over Palouse River in Adams County, Washington. It was built in 1941, so it is 84 years old, older 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 5 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 53 vehicles a day, roughly 30% of them trucks, projected to reach 71 by 2039. The structure is 337 ft (102.7 m) long and 26 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesOld SR 26 RD
CrossesPalouse River
Location00.19 MI S SR26
RouteCounty Highway 52012
CountyAdams County
StateWashington
Coordinates46.74393, -118.20241
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length337 ft (102.7 m)
Longest span81 ft (24.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2018)
Projected traffic71 by 2039
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$12.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old SR 26 RD over Palouse River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Old SR 26 RD over Palouse 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 November 2022.

How much traffic does Old SR 26 RD over Palouse River carry?

About 53 vehicles per day (2018 count), of which roughly 30% are trucks.

How long is Old SR 26 RD over Palouse River?

The structure is 337 ft (102.7 m) long with a longest span of 81 ft (24.7 m) and a deck 26 ft wide.

Who owns Old SR 26 RD over Palouse River?

It is owned by the County Highway Agency.