US Bridges

US101(HWY009) over Twomile Creek

Fair

Coos County, Oregon · 05.4 MI S HWY 244 JCT · Structure no. 03190 009 27872

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
5,604
2022 count
Owner
State
State Highway Agency

About this bridge

US101(HWY009) over Twomile Creek is a prestressed concrete slab carrying US101(HWY009) over Twomile Creek in Coos County, Oregon. It was built in 1965, so it is 60 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 5,604 vehicles a day, roughly 6% of them trucks, projected to reach 5,700 by 2042. The structure is 37 ft (11.3 m) long and 43 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesUS101(HWY009)
CrossesTwomile Creek
Location05.4 MI S HWY 244 JCT
RouteU.S. Route 101
CountyCoos County
StateOregon
Coordinates43.05189, -124.41522
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 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 within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: 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 rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length37 ft (11.3 m)
Longest span37 ft (11.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,604 (2022)
Projected traffic5,700 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$247,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US101(HWY009) over Twomile Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is US101(HWY009) over Twomile Creek 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 Twomile Creek carry?

About 5,604 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US101(HWY009) over Twomile Creek?

The structure is 37 ft (11.3 m) long with a longest span of 37 ft (11.3 m) and a deck 43 ft wide.

Who owns US101(HWY009) over Twomile Creek?

It is owned by the State Highway Agency.