US Bridges

Pittsburg Road over Milton Creek

Fair

Columbia County, Oregon · 007 MI W HWY30 on Pittsbg · Structure no. 13690A112800839

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
2,590
2020 count
Owner
County
County Highway Agency

About this bridge

Pittsburg Road over Milton Creek is a concrete continuous tee beam carrying Pittsburg Road over Milton Creek in Columbia County, Oregon. It was built in 1965, so it is 60 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 2,590 vehicles a day, roughly 10% of them trucks, projected to reach 2,935 by 2025. The structure is 106 ft (32.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPittsburg Road
CrossesMilton Creek
Location007 MI W HWY30 on Pittsbg
RouteCounty Highway A0745
CountyColumbia County
StateOregon
Coordinates45.86412, -122.83172
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to 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 rating49.1 US tons
Inventory rating29 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span40 ft (12.2 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,590 (2020)
Projected traffic2,935 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Pittsburg Road over Milton Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Pittsburg Road 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 Pittsburg Road over Milton Creek carry?

About 2,590 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Pittsburg Road over Milton Creek?

The structure is 106 ft (32.3 m) long with a longest span of 40 ft (12.2 m) and a deck 42 ft wide.

Who owns Pittsburg Road over Milton Creek?

It is owned by the County Highway Agency.