US Bridges

SQUAW/3660 over Pine Creek

Fair

Whitman County, Washington · 1.26 MI SE Spkn Cnty Line · Structure no. 080621000000000

Built
1963
62 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
103 ft
1 main span
Daily traffic
57
2021 count
Owner
County
County Highway Agency

About this bridge

SQUAW/3660 over Pine Creek is a prestressed concrete tee beam carrying SQUAW/3660 over Pine 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 57 vehicles a day, roughly 25% of them trucks, projected to reach 58 by 2044. The structure is 103 ft (31.4 m) long and 24 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSQUAW/3660
CrossesPine Creek
Location1.26 MI SE Spkn Cnty Line
RouteCounty Highway 36600
CountyWhitman County
StateWashington
Coordinates47.24998, -117.43545
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length103 ft (31.4 m)
Longest span101 ft (30.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2021)
Projected traffic58 by 2044
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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$4.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SQUAW/3660 over Pine Creek built?

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

What condition is SQUAW/3660 over Pine 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 SQUAW/3660 over Pine Creek carry?

About 57 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is SQUAW/3660 over Pine Creek?

The structure is 103 ft (31.4 m) long with a longest span of 101 ft (30.8 m) and a deck 24 ft wide.

Who owns SQUAW/3660 over Pine Creek?

It is owned by the County Highway Agency.