US Bridges

US101(HWY009) over Haynes Inlet Slough

FairPosted for load

Coos County, Oregon · 02.3 MI N HWY 240 JCT · Structure no. 18544 009 23309

Built
2001
24 years old
Condition
Fair
inspected May 2023
Type
Arch - Deck
Prestressed Concrete Continuous
Length
773 ft
3 main spans
Daily traffic
17,340
2022 count
Owner
State
State Highway Agency

About this bridge

US101(HWY009) over Haynes Inlet Slough is a prestressed concrete continuous arch - deck carrying US101(HWY009) over Haynes Inlet 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 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. Its operating status is: posted for other load-capacity restriction.

It carries about 17,340 vehicles a day, roughly 16% of them trucks, projected to reach 17,400 by 2042. The structure is 773 ft (235.7 m) long and 85 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUS101(HWY009)
CrossesHaynes Inlet Slough
Location02.3 MI N HWY 240 JCT
RouteU.S. Route 101
CountyCoos County
StateOregon
Coordinates43.43986, -124.2201
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.3 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+3 approach)
Design loadHS 20
Structure length773 ft (235.7 m)
Longest span239 ft (72.8 m)
Deck width85 ft (25.8 m)
Roadway width83 ft (25.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,340 (2022)
Projected traffic17,400 by 2042
Trucks16%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US101(HWY009) over Haynes Inlet Slough built?

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

What condition is US101(HWY009) over Haynes Inlet 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 Haynes Inlet Slough carry?

About 17,340 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US101(HWY009) over Haynes Inlet Slough?

The structure is 773 ft (235.7 m) long with a longest span of 239 ft (72.8 m) and a deck 85 ft wide.

Who owns US101(HWY009) over Haynes Inlet Slough?

It is owned by the State Highway Agency.