US Bridges

PENEWAWA/8100 over Little Penewawa Creek

Good

Whitman County, Washington · 4.45 MI SW SR 26 · Structure no. 086287000000000

Built
1997
28 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
122 ft
1 main span
Daily traffic
31
2020 count
Owner
County
County Highway Agency

About this bridge

PENEWAWA/8100 over Little Penewawa Creek is a prestressed concrete tee beam carrying PENEWAWA/8100 over Little Penewawa Creek in Whitman County, Washington. It was built in 1997, so it is 28 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 31 vehicles a day, roughly 25% of them trucks, projected to reach 32 by 2039. The structure is 122 ft (37.2 m) long and 32 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesPENEWAWA/8100
CrossesLittle Penewawa Creek
Location4.45 MI SW SR 26
RouteCounty Highway 81000
Coordinates46.75003, -117.5891
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length122 ft (37.2 m)
Longest span117 ft (35.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2020)
Projected traffic32 by 2039
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$4.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was PENEWAWA/8100 over Little Penewawa Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is PENEWAWA/8100 over Little Penewawa 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 PENEWAWA/8100 over Little Penewawa Creek carry?

About 31 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is PENEWAWA/8100 over Little Penewawa Creek?

The structure is 122 ft (37.2 m) long with a longest span of 117 ft (35.8 m) and a deck 32 ft wide.

Who owns PENEWAWA/8100 over Little Penewawa Creek?

It is owned by the County Highway Agency.