US Bridges

Texas LAKE/4140 over Rock Creek

Fair

Whitman County, Washington · 0.72 MI S Wagner · Structure no. 079735000000000

Built
1963
62 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
34
2021 count
Owner
County
County Highway Agency

About this bridge

Texas LAKE/4140 over Rock Creek is a prestressed concrete tee beam carrying Texas LAKE/4140 over Rock Creek in Whitman County, Washington. It was built in 1963, so it is 62 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 34 vehicles a day, roughly 25% of them trucks, projected to reach 35 by 2044. The structure is 97 ft (29.6 m) long and 16 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesTexas LAKE/4140
CrossesRock Creek
Location0.72 MI S Wagner
RouteCounty Highway 41400
CountyWhitman County
StateWashington
Coordinates47.08238, -117.85115
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length97 ft (29.6 m)
Longest span95 ft (29 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2021)
Projected traffic35 by 2044
Trucks25%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$2.6 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Texas LAKE/4140 over Rock Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Texas LAKE/4140 over Rock Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does Texas LAKE/4140 over Rock Creek carry?

About 34 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is Texas LAKE/4140 over Rock Creek?

The structure is 97 ft (29.6 m) long with a longest span of 95 ft (29 m) and a deck 16 ft wide.

Who owns Texas LAKE/4140 over Rock Creek?

It is owned by the County Highway Agency.