US Bridges

Robinson Fork RD over Wolf Fork

Good

Columbia County, Washington · 0.02 S JCT 13890 · Structure no. 086735000000000

Built
2001
24 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
49
2020 count
Owner
County
County Highway Agency

About this bridge

Robinson Fork RD over Wolf Fork is a prestressed concrete stringer/multi-beam or girder carrying Robinson Fork RD over Wolf Fork in Columbia County, Washington. It was built in 2001, so it is 24 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 49 vehicles a day, roughly 15% of them trucks, projected to reach 51 by 2042. The structure is 72 ft (21.9 m) long and 24 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesRobinson Fork RD
CrossesWolf Fork
Location0.02 S JCT 13890
RouteCounty Highway 13730
CountyColumbia County
StateWashington
Coordinates46.23716, -117.89359
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 protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.5 US tons
Inventory rating34.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span70 ft (21.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2020)
Projected traffic51 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$752,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Robinson Fork RD over Wolf Fork built?

It was built in 2001, making it 24 years old in 2025.

What condition is Robinson Fork RD over Wolf Fork 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 October 2024.

How much traffic does Robinson Fork RD over Wolf Fork carry?

About 49 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Robinson Fork RD over Wolf Fork?

The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.

Who owns Robinson Fork RD over Wolf Fork?

It is owned by the County Highway Agency.