US Bridges

US101(HWY009) over Garrison Slough

Fair

Curry County, Oregon · 01.0 MI N HWY 251 JCT · Structure no. 16231 009 30000

Built
1976
49 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
500 ft
10 main spans
Daily traffic
4,886
2022 count
Owner
State
State Highway Agency

About this bridge

US101(HWY009) over Garrison Slough is a prestressed concrete slab carrying US101(HWY009) over Garrison Slough in Curry County, Oregon. It was built in 1976, so it is 49 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.

It carries about 4,886 vehicles a day, roughly 16% of them trucks, projected to reach 5,000 by 2042. The structure is 500 ft (152.4 m) long and 72 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS101(HWY009)
CrossesGarrison Slough
Location01.0 MI N HWY 251 JCT
RouteU.S. Route 101
StateOregon
Coordinates42.75776, -124.49738
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans10
Design loadHS 20
Structure length500 ft (152.4 m)
Longest span50 ft (15.2 m)
Deck width72 ft (21.9 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,886 (2022)
Projected traffic5,000 by 2042
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Garrison Slough built?

It was built in 1976, making it 49 years old in 2025.

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

About 4,886 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US101(HWY009) over Garrison Slough?

The structure is 500 ft (152.4 m) long with a longest span of 50 ft (15.2 m) and a deck 72 ft wide.

Who owns US101(HWY009) over Garrison Slough?

It is owned by the State Highway Agency.