US Bridges

EVANS/8350 over Union Flat Creek

Good

Whitman County, Washington · 2.23 MI NE SR 194 · Structure no. 086043000000000

Built
1993
32 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

EVANS/8350 over Union Flat Creek is a prestressed concrete tee beam carrying EVANS/8350 over Union Flat Creek in Whitman County, Washington. It was built in 1993, so it is 32 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 20 vehicles a day, projected to reach 21 by 2039. The structure is 120 ft (36.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesEVANS/8350
CrossesUnion Flat Creek
Location2.23 MI NE SR 194
RouteCounty Highway 83500
CountyWhitman County
StateWashington
Coordinates46.76343, -117.34382
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.1 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span118 ft (36.1 m)
Deck width31 ft (9.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic21 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$4.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was EVANS/8350 over Union Flat Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is EVANS/8350 over Union Flat 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 2024.

How much traffic does EVANS/8350 over Union Flat Creek carry?

About 20 vehicles per day (2020 count).

How long is EVANS/8350 over Union Flat Creek?

The structure is 120 ft (36.6 m) long with a longest span of 118 ft (36.1 m) and a deck 31 ft wide.

Who owns EVANS/8350 over Union Flat Creek?

It is owned by the County Highway Agency.