US Bridges

US101 (hwy 9) over Rock Creek

Good

Lane County, Oregon · 06.8 MI S Linc-Lane CO LN · Structure no. 20004 009 17440

Built
2008
17 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
185 ft
1 main span
Daily traffic
3,003
2022 count
Owner
State
State Highway Agency

About this bridge

US101 (hwy 9) over Rock Creek is a prestressed concrete box beam or girders - multiple carrying US101 (hwy 9) over Rock Creek in Lane County, Oregon. It was built in 2008, so it is 17 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 3,003 vehicles a day, roughly 8% of them trucks, projected to reach 4,200 by 2042. The structure is 185 ft (56.4 m) long and 39 ft wide. If it were closed, the detour would be 81.4 mi (131 km).

Location

Open in Google Maps
CarriesUS101 (hwy 9)
CrossesRock Creek
Location06.8 MI S Linc-Lane CO LN
RouteU.S. Route 101
CountyLane County
StateOregon
Coordinates44.18333, -124.1153
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating77.5 US tons
Inventory rating59.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length185 ft (56.4 m)
Longest span185 ft (56.4 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,003 (2022)
Projected traffic4,200 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed81.4 mi (131 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 (hwy 9) over Rock Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is US101 (hwy 9) over Rock Creek 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 July 2023.

How much traffic does US101 (hwy 9) over Rock Creek carry?

About 3,003 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US101 (hwy 9) over Rock Creek?

The structure is 185 ft (56.4 m) long with a longest span of 185 ft (56.4 m) and a deck 39 ft wide.

Who owns US101 (hwy 9) over Rock Creek?

It is owned by the State Highway Agency.