US Bridges

US101(HWY009) over Davis Slough

Good

Coos County, Oregon · 00.6 MI S HWY 035 JCT · Structure no. 18628 009 24482

Built
2001
24 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
442 ft
4 main spans
Daily traffic
7,589
2022 count
Owner
State
State Highway Agency

About this bridge

US101(HWY009) over Davis Slough is a prestressed concrete continuous box beam or girders - multiple carrying US101(HWY009) over Davis Slough in Coos County, Oregon. It was built in 2001, so it is 24 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,589 vehicles a day, roughly 7% of them trucks, projected to reach 7,700 by 2042. The structure is 442 ft (134.8 m) long and 46 ft wide. If it were closed, the detour would be 25.5 mi (41 km).

Location

Open in Google Maps
CarriesUS101(HWY009)
CrossesDavis Slough
Location00.6 MI S HWY 035 JCT
RouteU.S. Route 101
CountyCoos County
StateOregon
Coordinates43.28972, -124.2268
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length442 ft (134.8 m)
Longest span111 ft (33.7 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,589 (2022)
Projected traffic7,700 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed25.5 mi (41 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US101(HWY009) over Davis Slough built?

It was built in 2001, making it 24 years old in 2025.

What condition is US101(HWY009) over Davis Slough 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 May 2023.

How much traffic does US101(HWY009) over Davis Slough carry?

About 7,589 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US101(HWY009) over Davis Slough?

The structure is 442 ft (134.8 m) long with a longest span of 111 ft (33.7 m) and a deck 46 ft wide.

Who owns US101(HWY009) over Davis Slough?

It is owned by the State Highway Agency.