US Bridges

Or 18 (hwy 39) over Casino Entrance Road

Good

Polk County, Oregon · At Grande Ronde Casino · Structure no. 17986 039 02275

Built
1996
29 years old
Condition
Good
inspected November 2024
Type
Slab
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
17,452
2022 count
Owner
State
State Highway Agency

About this bridge

Or 18 (hwy 39) over Casino Entrance Road is a prestressed concrete slab carrying Or 18 (hwy 39) over Casino Entrance Road in Polk County, Oregon. It was built in 1996, so it is 29 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 17,452 vehicles a day, roughly 3% of them trucks, projected to reach 17,600 by 2042. The structure is 32 ft (9.8 m) long and 59 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesOr 18 (hwy 39)
CrossesCasino Entrance Road
LocationAt Grande Ronde Casino
RouteState Highway 18
CountyPolk County
StateOregon
Coordinates45.06012, -123.58097
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating50.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width59 ft (18.1 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,452 (2022)
Projected traffic17,600 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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$164,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 18 (hwy 39) over Casino Entrance Road built?

It was built in 1996, making it 29 years old in 2025.

What condition is Or 18 (hwy 39) over Casino Entrance Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Or 18 (hwy 39) over Casino Entrance Road carry?

About 17,452 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Or 18 (hwy 39) over Casino Entrance Road?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 59 ft wide.

Who owns Or 18 (hwy 39) over Casino Entrance Road?

It is owned by the State Highway Agency.