US Bridges

County RD 539 over Alder CR (old US 30

Good

Baker County, Oregon · 025 MI E Oxman Oxing I-84 · Structure no. 01409 B52200272

Built
1929
96 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete
Length
45 ft
1 main span
Daily traffic
426
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 539 over Alder CR (old US 30 is a concrete tee beam carrying County RD 539 over Alder CR (old US 30 in Baker County, Oregon. It was built in 1929, so it is 96 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 426 vehicles a day, roughly 3% of them trucks, projected to reach 466 by 2025. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 539
CrossesAlder CR (old US 30
Location025 MI E Oxman Oxing I-84
RouteCounty Highway 539
CountyBaker County
StateOregon
Coordinates44.60304, -117.48492
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span42 ft (12.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic426 (2020)
Projected traffic466 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 County RD 539 over Alder CR (old US 30 built?

It was built in 1929, making it 96 years old in 2025.

What condition is County RD 539 over Alder CR (old US 30 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 October 2024.

How much traffic does County RD 539 over Alder CR (old US 30 carry?

About 426 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is County RD 539 over Alder CR (old US 30?

The structure is 45 ft (13.7 m) long with a longest span of 42 ft (12.8 m) and a deck 28 ft wide.

Who owns County RD 539 over Alder CR (old US 30?

It is owned by the County Highway Agency.