US Bridges

Pittsburg Road over Milton Creek

Fair

Columbia County, Oregon · 010 M E Yankton · Structure no. 13691A112800644

Built
1976
49 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
2,294
2020 count
Owner
County
County Highway Agency

About this bridge

Pittsburg Road over Milton Creek is a prestressed concrete slab carrying Pittsburg Road over Milton Creek in Columbia County, Oregon. It was built in 1976, so it is 49 years old, younger 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 2,294 vehicles a day, roughly 10% of them trucks, projected to reach 2,599 by 2025. The structure is 66 ft (20.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPittsburg Road
CrossesMilton Creek
Location010 M E Yankton
RouteCounty Highway A0745
CountyColumbia County
StateOregon
Coordinates45.86585, -122.86601
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,294 (2020)
Projected traffic2,599 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 1976, making it 49 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 2,294 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Pittsburg Road over Milton Creek?

The structure is 66 ft (20.1 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns Pittsburg Road over Milton Creek?

It is owned by the County Highway Agency.