US Bridges

High Pass Road over Flat Creek

Good

Lane County, Oregon · 010 MI West Junction City · Structure no. 18609 345500107

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
3,038
2020 count
Owner
County
County Highway Agency

About this bridge

High Pass Road over Flat Creek is a prestressed concrete slab carrying High Pass Road over Flat Creek in Lane County, Oregon. It was built in 1997, so it is 28 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 3,038 vehicles a day, roughly 10% of them trucks, projected to reach 3,233 by 2025. The structure is 65 ft (19.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHigh Pass Road
CrossesFlat Creek
Location010 MI West Junction City
RouteCounty Highway A0456
StateOregon
Coordinates44.21517, -123.22554
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length65 ft (19.8 m)
Longest span64 ft (19.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,038 (2020)
Projected traffic3,233 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 High Pass Road over Flat Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is High Pass Road over Flat 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 2024.

How much traffic does High Pass Road over Flat Creek carry?

About 3,038 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is High Pass Road over Flat Creek?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 32 ft wide.

Who owns High Pass Road over Flat Creek?

It is owned by the County Highway Agency.