US Bridges

Columbia Blvd over Milton Creek

Fair

Columbia County, Oregon · 002 MI W JCT C1111/HWY30 · Structure no. 13757A111101082

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
126 ft
3 main spans
Daily traffic
6,466
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Columbia Blvd over Milton Creek is a concrete continuous tee beam carrying Columbia Blvd over Milton Creek in Columbia County, Oregon. It was built in 1958, so it is 67 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 5 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 6,466 vehicles a day, roughly 10% of them trucks, projected to reach 7,644 by 2025. The structure is 126 ft (38.4 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesColumbia Blvd
CrossesMilton Creek
Location002 MI W JCT C1111/HWY30
RouteCounty Highway C0000
CountyColumbia County
StateOregon
Coordinates45.85867, -122.82395
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span52 ft (15.8 m)
Deck width42 ft (12.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,466 (2020)
Projected traffic7,644 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Columbia Blvd over Milton Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Columbia Blvd over Milton Creek 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 Columbia Blvd over Milton Creek carry?

About 6,466 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Columbia Blvd over Milton Creek?

The structure is 126 ft (38.4 m) long with a longest span of 52 ft (15.8 m) and a deck 42 ft wide.

Who owns Columbia Blvd over Milton Creek?

It is owned by the City or Municipal Highway Agency.