US Bridges

HITCHINGS/3550 over Cottonwood Creek

Good

Whitman County, Washington · 0.09 MI SW Sunset · Structure no. 084219000000000

Built
1976
49 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
25
2021 count
Owner
County
County Highway Agency

About this bridge

HITCHINGS/3550 over Cottonwood Creek is a prestressed concrete stringer/multi-beam or girder carrying HITCHINGS/3550 over Cottonwood Creek in Whitman County, Washington. It was built in 1976, so it is 49 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 25 vehicles a day, roughly 25% of them trucks, projected to reach 26 by 2044. The structure is 38 ft (11.6 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesHITCHINGS/3550
CrossesCottonwood Creek
Location0.09 MI SW Sunset
RouteCounty Highway 35500
CountyWhitman County
StateWashington
Coordinates47.09378, -117.43528
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span36 ft (11.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2021)
Projected traffic26 by 2044
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 HITCHINGS/3550 over Cottonwood Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is HITCHINGS/3550 over Cottonwood 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 HITCHINGS/3550 over Cottonwood Creek carry?

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

How long is HITCHINGS/3550 over Cottonwood Creek?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11.1 m) and a deck 24 ft wide.

Who owns HITCHINGS/3550 over Cottonwood Creek?

It is owned by the County Highway Agency.