US Bridges

Bellinger Scale RD over Hamilton CR

Poor

Linn County, Oregon · 003 MI N CR 20B · Structure no. 11974 072200027

Built
1967
58 years old
Condition
Poor
inspected June 2024
Type
Slab
Prestressed Concrete
Length
82 ft
3 main spans
Daily traffic
1,390
2021 count
Owner
County
County Highway Agency

About this bridge

Bellinger Scale RD over Hamilton CR is a prestressed concrete slab carrying Bellinger Scale RD over Hamilton CR in Linn County, Oregon. It was built in 1967, so it is 58 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 1,390 vehicles a day, roughly 10% of them trucks, projected to reach 1,957 by 2041. The structure is 82 ft (25 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesBellinger Scale RD
CrossesHamilton CR
Location003 MI N CR 20B
RouteCounty Highway C0722
StateOregon
Coordinates44.51352, -122.79803
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourUnknown foundation; not evaluated for scour
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 alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length82 ft (25 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,390 (2021)
Projected traffic1,957 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$546,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Bellinger Scale RD over Hamilton CR built?

It was built in 1967, making it 58 years old in 2025.

What condition is Bellinger Scale RD over Hamilton CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Bellinger Scale RD over Hamilton CR carry?

About 1,390 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Bellinger Scale RD over Hamilton CR?

The structure is 82 ft (25 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns Bellinger Scale RD over Hamilton CR?

It is owned by the County Highway Agency.