US Bridges

Or 140 (hwy 270) over Antelope Creek

Good

Jackson County, Oregon · 05.0 MI E HWY 022 JCT · Structure no. 09775 270 00499

Built
1969
56 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
4,484
2022 count
Owner
State
State Highway Agency

About this bridge

Or 140 (hwy 270) over Antelope Creek is a prestressed concrete stringer/multi-beam or girder carrying Or 140 (hwy 270) over Antelope Creek in Jackson County, Oregon. It was built in 1969, so it is 56 years old, older 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 4,484 vehicles a day, roughly 12% of them trucks, projected to reach 5,000 by 2042. The structure is 110 ft (33.5 m) long and 50 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesOr 140 (hwy 270)
CrossesAntelope Creek
Location05.0 MI E HWY 022 JCT
RouteState Highway 140
StateOregon
Coordinates42.43718, -122.75828
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span110 ft (33.5 m)
Deck width50 ft (15.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,484 (2022)
Projected traffic5,000 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemYes

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 Or 140 (hwy 270) over Antelope Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Or 140 (hwy 270) over Antelope 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 September 2023.

How much traffic does Or 140 (hwy 270) over Antelope Creek carry?

About 4,484 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Or 140 (hwy 270) over Antelope Creek?

The structure is 110 ft (33.5 m) long with a longest span of 110 ft (33.5 m) and a deck 50 ft wide.

Who owns Or 140 (hwy 270) over Antelope Creek?

It is owned by the State Highway Agency.