US Bridges

Kollock RD over Olequa Creek

Fair

Lewis County, Washington · 0.19 SE JCT.93000 · Structure no. 083892000000000

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
3 main spans
Daily traffic
45
2019 count
Owner
County
County Highway Agency

About this bridge

Kollock RD over Olequa Creek is a steel stringer/multi-beam or girder carrying Kollock RD over Olequa Creek in Lewis County, Washington. It was built in 1977, so it is 48 years old, younger 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 45 vehicles a day, roughly 31% of them trucks, projected to reach 82 by 2039. The structure is 95 ft (29 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesKollock RD
CrossesOlequa Creek
Location0.19 SE JCT.93000
RouteCounty Highway 35750
CountyLewis County
StateWashington
Coordinates46.43, -122.97
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length95 ft (29 m)
Longest span60 ft (18.3 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2019)
Projected traffic82 by 2039
Trucks31%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$722,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kollock RD over Olequa Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Kollock RD over Olequa 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 March 2023.

How much traffic does Kollock RD over Olequa Creek carry?

About 45 vehicles per day (2019 count), of which roughly 31% are trucks.

How long is Kollock RD over Olequa Creek?

The structure is 95 ft (29 m) long with a longest span of 60 ft (18.3 m) and a deck 16 ft wide.

Who owns Kollock RD over Olequa Creek?

It is owned by the County Highway Agency.