US Bridges

SR 127 over Alkali Flat CR

Good

Whitman County, Washington · 17.1 N Garfield CO · Structure no. 0015153A0000000

Built
1966
59 years old, rebuilt 1997
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
20 ft
2 main spans
Daily traffic
806
2023 count
Owner
State
State Highway Agency

About this bridge

SR 127 over Alkali Flat CR is a steel culvert carrying SR 127 over Alkali Flat CR in Whitman County, Washington. It was built in 1966 and reconstructed in 1997, so it is 59 years old, older 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 806 vehicles a day, roughly 22% of them trucks, projected to reach 842 by 2039. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSR 127
CrossesAlkali Flat CR
Location17.1 N Garfield CO
RouteState Highway 127
Coordinates46.80878, -117.65575
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
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 rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic806 (2023)
Projected traffic842 by 2039
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$342,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 127 over Alkali Flat CR built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1997.

What condition is SR 127 over Alkali Flat CR 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 2024.

How much traffic does SR 127 over Alkali Flat CR carry?

About 806 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is SR 127 over Alkali Flat CR?

The structure is 20 ft (6.1 m) long with a longest span of 8 ft (2.4 m).

Who owns SR 127 over Alkali Flat CR?

It is owned by the State Highway Agency.