US Bridges

SR 270 over S Fk Palouse

Good

Whitman County, Washington · 0.2 E SR 270 Copullmn · Structure no. 0014432A0000000

Built
1996
29 years old
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
10,725
2023 count
Owner
State
State Highway Agency

About this bridge

SR 270 over S Fk Palouse is a prestressed concrete stringer/multi-beam or girder carrying SR 270 over S Fk Palouse in Whitman 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 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 10,725 vehicles a day, roughly 5% of them trucks, projected to reach 14,360 by 2039. The structure is 95 ft (29 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 270
CrossesS Fk Palouse
Location0.2 E SR 270 Copullmn
RouteState Highway 270
Coordinates46.72943, -117.17374
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating72 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length95 ft (29 m)
Longest span90 ft (27.4 m)
Deck width63 ft (19.2 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,725 (2023)
Projected traffic14,360 by 2039
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 270 over S Fk Palouse built?

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

What condition is SR 270 over S Fk Palouse 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 April 2022.

How much traffic does SR 270 over S Fk Palouse carry?

About 10,725 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 270 over S Fk Palouse?

The structure is 95 ft (29 m) long with a longest span of 90 ft (27.4 m) and a deck 63 ft wide.

Who owns SR 270 over S Fk Palouse?

It is owned by the State Highway Agency.