US Bridges

IRR BIA RTE 4 over Agency Creek

FairPosted for load

Yamhill County, Oregon · 10.5KM NW 22/GRN Rond RD · Structure no. 00000000000P703

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
69 ft
3 main spans
Daily traffic
50
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 4 over Agency Creek is a concrete continuous stringer/multi-beam or girder carrying IRR BIA RTE 4 over Agency Creek in Yamhill County, Oregon. It was built in 1961, so it is 64 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 25% of them trucks, projected to reach 75 by 2043. The structure is 69 ft (21 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIRR BIA RTE 4
CrossesAgency Creek
Location10.5KM NW 22/GRN Rond RD
RouteFederal Lands Road 4
StateOregon
Coordinates45.14057, -123.68355
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating33.2 US tons
Inventory rating19.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length69 ft (21 m)
Longest span50 ft (15.2 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2043
Trucks25%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR BIA RTE 4 over Agency Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is IRR BIA RTE 4 over Agency 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 June 2023.

How much traffic does IRR BIA RTE 4 over Agency Creek carry?

About 50 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is IRR BIA RTE 4 over Agency Creek?

The structure is 69 ft (21 m) long with a longest span of 50 ft (15.2 m) and a deck 18 ft wide.

Who owns IRR BIA RTE 4 over Agency Creek?

It is owned by the Bureau of Indian Affairs.