US Bridges

Hamlet Road over N Fk Nehalem

Good

Clatsop County, Oregon · 049 MI SE JCT HWY 53 · Structure no. 11220A130100485

Built
1989
36 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
135 ft
2 main spans
Daily traffic
330
2020 count
Owner
County
County Highway Agency

About this bridge

Hamlet Road over N Fk Nehalem is a prestressed concrete slab carrying Hamlet Road over N Fk Nehalem in Clatsop County, Oregon. It was built in 1989, so it is 36 years old, younger than the Oregon average of 49.9 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 330 vehicles a day, roughly 20% of them trucks, projected to reach 400 by 2025. The structure is 135 ft (41.1 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesHamlet Road
CrossesN Fk Nehalem
Location049 MI SE JCT HWY 53
RouteCounty Highway C1301
CountyClatsop County
StateOregon
Coordinates45.84819, -123.70064
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span67 ft (20.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2020)
Projected traffic400 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Hamlet Road over N Fk Nehalem built?

It was built in 1989, making it 36 years old in 2025.

What condition is Hamlet Road over N Fk Nehalem 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 June 2023.

How much traffic does Hamlet Road over N Fk Nehalem carry?

About 330 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Hamlet Road over N Fk Nehalem?

The structure is 135 ft (41.1 m) long with a longest span of 67 ft (20.4 m) and a deck 24 ft wide.

Who owns Hamlet Road over N Fk Nehalem?

It is owned by the County Highway Agency.