US Bridges

Belmont to HWY 1 over Conn 3 to HWY 1 NB

Fair

Multnomah County, Oregon · 0.4 MI S of Burnside Br · Structure no. 08589B001 30150

Built
1963
62 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,464 ft
16 main spans
Daily traffic
2,518
2022 count
Owner
State
State Highway Agency

About this bridge

Belmont to HWY 1 over Conn 3 to HWY 1 NB is a steel stringer/multi-beam or girder carrying Belmont to HWY 1 over Conn 3 to HWY 1 NB in Multnomah County, Oregon. It was built in 1963, so it is 62 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 2,518 vehicles a day, roughly 12% of them trucks, projected to reach 52,800 by 2040. The structure is 1,464 ft (446.2 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBelmont to HWY 1
CrossesConn 3 to HWY 1 NB
Location0.4 MI S of Burnside Br
RouteInterstate 5
CountyMultnomah County
StateOregon
Coordinates45.5191, -122.66605
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.9 US tons
Inventory rating18.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans16 (+2 approach)
Design loadHS 20
Structure length1,464 ft (446.2 m)
Longest span145 ft (44.2 m)
Deck width23 ft (6.9 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic2,518 (2022)
Projected traffic52,800 by 2040
Trucks12%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$5.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Belmont to HWY 1 over Conn 3 to HWY 1 NB built?

It was built in 1963, making it 62 years old in 2025.

What condition is Belmont to HWY 1 over Conn 3 to HWY 1 NB 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 May 2023.

How much traffic does Belmont to HWY 1 over Conn 3 to HWY 1 NB carry?

About 2,518 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Belmont to HWY 1 over Conn 3 to HWY 1 NB?

The structure is 1,464 ft (446.2 m) long with a longest span of 145 ft (44.2 m) and a deck 23 ft wide.

Who owns Belmont to HWY 1 over Conn 3 to HWY 1 NB?

It is owned by the State Highway Agency.