US Bridges

County Road 1750 over So Fork Asotin Creek

Fair

Asotin County, Washington · 3.3 MI So JCT Rd. 1100 · Structure no. 083679000000000

Built
1957
68 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
1
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 1750 over So Fork Asotin Creek is a steel stringer/multi-beam or girder carrying County Road 1750 over So Fork Asotin Creek in Asotin County, Washington. It was built in 1957, so it is 68 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 6 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 1 vehicles a day, roughly 33% of them trucks, projected to reach 4 by 2040. The structure is 32 ft (9.8 m) long and 16 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesCounty Road 1750
CrossesSo Fork Asotin Creek
Location3.3 MI So JCT Rd. 1100
RouteCounty Highway 175
CountyAsotin County
StateWashington
Coordinates46.22545, -117.28087
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1 (2020)
Projected traffic4 by 2040
Trucks33%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed44.7 mi (72 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 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 1750 over So Fork Asotin Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is County Road 1750 over So Fork Asotin 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 April 2024.

How much traffic does County Road 1750 over So Fork Asotin Creek carry?

About 1 vehicles per day (2020 count), of which roughly 33% are trucks.

How long is County Road 1750 over So Fork Asotin Creek?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.

Who owns County Road 1750 over So Fork Asotin Creek?

It is owned by the County Highway Agency.