US Bridges

Gimple Hill over Willow Creek EB

Fair

Lane County, Oregon · 0017 MI W of Bailey Hill · Structure no. 39C128122000017

Built
1980
45 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
1,380
2010 count
Owner
County
County Highway Agency

About this bridge

Gimple Hill over Willow Creek EB is a prestressed concrete slab carrying Gimple Hill over Willow Creek EB in Lane County, Oregon. It was built in 1980, so it is 45 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 1,380 vehicles a day, roughly 10% of them trucks, projected to reach 2,475 by 2030. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesGimple Hill
CrossesWillow Creek EB
Location0017 MI W of Bailey Hill
RouteCounty Highway C1220
StateOregon
Coordinates44.02394, -123.17135
Functional classUrban Collector

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.
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 alignment6: Equal to present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,380 (2010)
Projected traffic2,475 by 2030
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Gimple Hill over Willow Creek EB built?

It was built in 1980, making it 45 years old in 2025.

What condition is Gimple Hill over Willow Creek EB 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 July 2024.

How much traffic does Gimple Hill over Willow Creek EB carry?

About 1,380 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Gimple Hill over Willow Creek EB?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns Gimple Hill over Willow Creek EB?

It is owned by the County Highway Agency.