US Bridges

Barnett RD over Rock Creek

FairPosted for load

Gilliam County, Oregon · 9.2 MI NW of HWY 19 · Structure no. 21C07 450 00838

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
63 ft
3 main spans
Daily traffic
93
2020 count
Owner
County
County Highway Agency

About this bridge

Barnett RD over Rock Creek is a concrete continuous tee beam carrying Barnett RD over Rock Creek in Gilliam County, Oregon. It was built in 1957, so it is 68 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 93 vehicles a day, roughly 10% of them trucks, projected to reach 108 by 2025. The structure is 63 ft (19.2 m) long and 29 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

Location

Open in Google Maps
CarriesBarnett RD
CrossesRock Creek
Location9.2 MI NW of HWY 19
RouteCounty Highway 0
CountyGilliam County
StateOregon
Coordinates45.5717, -120.2984
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10.7 US tons
Inventory rating8.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span42 ft (12.8 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93 (2020)
Projected traffic108 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 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 Barnett RD over Rock Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Barnett RD over Rock 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 July 2023.

How much traffic does Barnett RD over Rock Creek carry?

About 93 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Barnett RD over Rock Creek?

The structure is 63 ft (19.2 m) long with a longest span of 42 ft (12.8 m) and a deck 29 ft wide.

Who owns Barnett RD over Rock Creek?

It is owned by the County Highway Agency.