US Bridges

Fort Hill Road over Or 18 (hwy 39)

Fair

Polk County, Oregon · 1.46 MI S Valley JCT · Structure no. 20252 039 02466

Built
2009
16 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
2 main spans
Daily traffic
16,490
2022 count
Owner
State
State Highway Agency

About this bridge

Fort Hill Road over Or 18 (hwy 39) is a prestressed concrete continuous stringer/multi-beam or girder carrying Fort Hill Road over Or 18 (hwy 39) in Polk County, Oregon. It was built in 2009, so it is 16 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 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 16,490 vehicles a day, roughly 3% of them trucks, projected to reach 17,100 by 2042. The structure is 230 ft (70.1 m) long and 39 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesFort Hill Road
CrossesOr 18 (hwy 39)
Location1.46 MI S Valley JCT
RouteCounty Highway 0
CountyPolk County
StateOregon
Coordinates45.0545, -123.5418
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length230 ft (70.1 m)
Longest span115 ft (35.1 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,490 (2022)
Projected traffic17,100 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fort Hill Road over Or 18 (hwy 39) built?

It was built in 2009, making it 16 years old in 2025.

What condition is Fort Hill Road over Or 18 (hwy 39) 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 November 2024.

How much traffic does Fort Hill Road over Or 18 (hwy 39) carry?

About 16,490 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Fort Hill Road over Or 18 (hwy 39)?

The structure is 230 ft (70.1 m) long with a longest span of 115 ft (35.1 m) and a deck 39 ft wide.

Who owns Fort Hill Road over Or 18 (hwy 39)?

It is owned by the State Highway Agency.