US Bridges

Foss RD over Nehalem River

Fair

Tillamook County, Oregon · 04.5 Miles E Mohler · Structure no. 11279A507 00650

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
260 ft
1 main span
Daily traffic
170
2020 count
Owner
County
County Highway Agency

About this bridge

Foss RD over Nehalem River is a prestressed concrete stringer/multi-beam or girder carrying Foss RD over Nehalem River in Tillamook County, Oregon. It was built in 1980, so it is 45 years old, younger 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 170 vehicles a day, roughly 15% of them trucks, projected to reach 200 by 2025. The structure is 260 ft (79.2 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFoss RD
CrossesNehalem River
Location04.5 Miles E Mohler
RouteCounty Highway A0727
CountyTillamook County
StateOregon
Coordinates45.7225, -123.77231
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.2 US tons
Inventory rating13.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span130 ft (39.6 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2020)
Projected traffic200 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Foss RD over Nehalem River built?

It was built in 1980, making it 45 years old in 2025.

What condition is Foss RD over Nehalem River 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 June 2023.

How much traffic does Foss RD over Nehalem River carry?

About 170 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Foss RD over Nehalem River?

The structure is 260 ft (79.2 m) long with a longest span of 130 ft (39.6 m) and a deck 32 ft wide.

Who owns Foss RD over Nehalem River?

It is owned by the County Highway Agency.