US Bridges

County RD 1B over Yankee Run Creek

Fair

Coos County, Oregon · 0900 Miles from Cooper Br · Structure no. 11C09 001B01315

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
360
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 1B over Yankee Run Creek is a prestressed concrete slab carrying County RD 1B over Yankee Run Creek in Coos County, Oregon. It was built in 1970, so it is 55 years old, older 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 360 vehicles a day, roughly 10% of them trucks, projected to reach 405 by 2025. The structure is 50 ft (15.2 m) long and 24 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesCounty RD 1B
CrossesYankee Run Creek
Location0900 Miles from Cooper Br
RouteCounty Highway 0A420
StateOregon
Coordinates43.12706, -124.02485
Functional classRural Major 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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span46 ft (14 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2020)
Projected traffic405 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 1B over Yankee Run Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is County RD 1B over Yankee Run Creek 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 September 2024.

How much traffic does County RD 1B over Yankee Run Creek carry?

About 360 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 1B over Yankee Run Creek?

The structure is 50 ft (15.2 m) long with a longest span of 46 ft (14 m) and a deck 24 ft wide.

Who owns County RD 1B over Yankee Run Creek?

It is owned by the County Highway Agency.