US Bridges

SR 27 over N Fk Four Mile Creek

Good

Whitman County, Washington · 10.1 N JCT SR 270 · Structure no. 0002364A0000000

Built
1983
42 years old
Condition
Good
inspected April 2022
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
2,772
2023 count
Owner
State
State Highway Agency

About this bridge

SR 27 over N Fk Four Mile Creek is a concrete continuous culvert carrying SR 27 over N Fk Four Mile Creek in Whitman County, Washington. It was built in 1983, so it is 42 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 2,772 vehicles a day, roughly 6% of them trucks, projected to reach 3,270 by 2039. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 49.7 mi (80 km).

CarriesSR 27
CrossesN Fk Four Mile Creek
Location10.1 N JCT SR 270
RouteState Highway 27
Coordinates46.85814, -117.13036
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating83.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadRailroad
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,772 (2023)
Projected traffic3,270 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

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$442,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 27 over N Fk Four Mile Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 27 over N Fk Four Mile 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 April 2022.

How much traffic does SR 27 over N Fk Four Mile Creek carry?

About 2,772 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is SR 27 over N Fk Four Mile Creek?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns SR 27 over N Fk Four Mile Creek?

It is owned by the State Highway Agency.