US Bridges

French Charlie RD over Rock Creek

Good

Gilliam County, Oregon · 4.5 MI NW of HWY 19 · Structure no. 21C03 703 00450

Built
1987
38 years old
Condition
Good
inspected July 2023
Type
Slab
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
13
2020 count
Owner
County
County Highway Agency

About this bridge

French Charlie RD over Rock Creek is a prestressed concrete slab carrying French Charlie RD over Rock Creek in Gilliam County, Oregon. It was built in 1987, so it is 38 years old, younger 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 13 vehicles a day, roughly 10% of them trucks, projected to reach 15 by 2025. The structure is 27 ft (8.2 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFrench Charlie RD
CrossesRock Creek
Location4.5 MI NW of HWY 19
RouteCounty Highway 0
StateOregon
Coordinates45.5316, -120.2315
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating56 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13 (2020)
Projected traffic15 by 2025
Trucks10%
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 French Charlie RD over Rock Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is French Charlie RD over Rock 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 July 2023.

How much traffic does French Charlie RD over Rock Creek carry?

About 13 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is French Charlie RD over Rock Creek?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 24 ft wide.

Who owns French Charlie RD over Rock Creek?

It is owned by the County Highway Agency.