US Bridges

Steptoe Cny 9280 over Steptoe Creek

Good

Whitman County, Washington · 6.14 Miles S of RD 9270 · Structure no. 089459000000000

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
3
2023 count
Owner
County
County Highway Agency

About this bridge

Steptoe Cny 9280 over Steptoe Creek is a steel stringer/multi-beam or girder carrying Steptoe Cny 9280 over Steptoe Creek in Whitman County, Washington. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3 vehicles a day, roughly 1% of them trucks, projected to reach 4 by 2044. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 70.2 mi (113 km).

Location

Open in Google Maps
CarriesSteptoe Cny 9280
CrossesSteptoe Creek
Location6.14 Miles S of RD 9270
RouteCounty Highway 9280
CountyWhitman County
StateWashington
Coordinates46.46992, -117.17598
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadGreater than HL 93
Structure length36 ft (11 m)
Longest span34 ft (10.5 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3 (2023)
Projected traffic4 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.2 mi (113 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Steptoe Cny 9280 over Steptoe Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Steptoe Cny 9280 over Steptoe 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 December 2023.

How much traffic does Steptoe Cny 9280 over Steptoe Creek carry?

About 3 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Steptoe Cny 9280 over Steptoe Creek?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.5 m) and a deck 24 ft wide.

Who owns Steptoe Cny 9280 over Steptoe Creek?

It is owned by the County Highway Agency.