US Bridges

US101(HWY009) over North Slough

Fair

Coos County, Oregon · 06.0 MI N HWY 240 JCT · Structure no. 07493 009 22943

Built
1953
72 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
24 ft
3 main spans
Daily traffic
12,441
2022 count
Owner
State
State Highway Agency

About this bridge

US101(HWY009) over North Slough is a concrete continuous culvert carrying US101(HWY009) over North Slough in Coos County, Oregon. It was built in 1953, so it is 72 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 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 12,441 vehicles a day, roughly 16% of them trucks, projected to reach 12,500 by 2042. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS101(HWY009)
CrossesNorth Slough
Location06.0 MI N HWY 240 JCT
RouteU.S. Route 101
CountyCoos County
StateOregon
Coordinates43.49055, -124.22015
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 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 above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,441 (2022)
Projected traffic12,500 by 2042
Trucks16%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 North Slough built?

It was built in 1953, making it 72 years old in 2025.

What condition is US101(HWY009) over North Slough 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 US101(HWY009) over North Slough carry?

About 12,441 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US101(HWY009) over North Slough?

The structure is 24 ft (7.3 m) long with a longest span of 8 ft (2.4 m).

Who owns US101(HWY009) over North Slough?

It is owned by the State Highway Agency.