US Bridges

Lewis & Clark RD over Main Line Road

Fair

Clatsop County, Oregon · 050 MI S HWY101-YOUNGS by · Structure no. 07C03 080900479

Built
1960
65 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
122 ft
1 main span
Daily traffic
675
2020 count
Owner
County
County Highway Agency

About this bridge

Lewis & Clark RD over Main Line Road is a prestressed concrete stringer/multi-beam or girder carrying Lewis & Clark RD over Main Line Road in Clatsop County, Oregon. It was built in 1960, so it is 65 years old, older than the Oregon average of 49.9 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 675 vehicles a day, roughly 10% of them trucks, projected to reach 765 by 2025. The structure is 122 ft (37.2 m) long and 30 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesLewis & Clark RD
CrossesMain Line Road
Location050 MI S HWY101-YOUNGS by
RouteCounty Highway C0809
CountyClatsop County
StateOregon
Coordinates46.09172, -123.85757
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length122 ft (37.2 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic675 (2020)
Projected traffic765 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lewis & Clark RD over Main Line Road built?

It was built in 1960, making it 65 years old in 2025.

What condition is Lewis & Clark RD over Main Line Road 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 Lewis & Clark RD over Main Line Road carry?

About 675 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Lewis & Clark RD over Main Line Road?

The structure is 122 ft (37.2 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns Lewis & Clark RD over Main Line Road?

It is owned by the County Highway Agency.