US Bridges

Or 6 (hwy 37) over Slide Drainage

Fair

Tillamook County, Oregon · 069 MI E of HWY 9 JCT · Structure no. 01979B037 00690

Built
1967
58 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
5,092
2022 count
Owner
State
State Highway Agency

About this bridge

Or 6 (hwy 37) over Slide Drainage is a prestressed concrete box beam or girders - multiple carrying Or 6 (hwy 37) over Slide Drainage in Tillamook County, Oregon. It was built in 1967, so it is 58 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 5,092 vehicles a day, roughly 16% of them trucks, projected to reach 6,000 by 2042. The structure is 95 ft (29 m) long and 44 ft wide. If it were closed, the detour would be 33.6 mi (54 km).

CarriesOr 6 (hwy 37)
CrossesSlide Drainage
Location069 MI E of HWY 9 JCT
RouteState Highway 6
StateOregon
Coordinates45.48119, -123.71911
Functional classRural 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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating34.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length95 ft (29 m)
Longest span95 ft (29 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,092 (2022)
Projected traffic6,000 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed33.6 mi (54 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Or 6 (hwy 37) over Slide Drainage built?

It was built in 1967, making it 58 years old in 2025.

What condition is Or 6 (hwy 37) over Slide Drainage 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 April 2024.

How much traffic does Or 6 (hwy 37) over Slide Drainage carry?

About 5,092 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Or 6 (hwy 37) over Slide Drainage?

The structure is 95 ft (29 m) long with a longest span of 95 ft (29 m) and a deck 44 ft wide.

Who owns Or 6 (hwy 37) over Slide Drainage?

It is owned by the State Highway Agency.