US Bridges

Lost CR RD over Lost Creek

Good

Columbia County, Oregon · 012 MI So Delena · Structure no. 20658 410500135

Built
2007
18 years old
Condition
Good
inspected May 2023
Type
Slab
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
409
2020 count
Owner
County
County Highway Agency

About this bridge

Lost CR RD over Lost Creek is a prestressed concrete slab carrying Lost CR RD over Lost Creek in Columbia County, Oregon. It was built in 2007, so it is 18 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 409 vehicles a day, roughly 10% of them trucks, projected to reach 451 by 2025. The structure is 42 ft (12.8 m) long and 28 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesLost CR RD
CrossesLost Creek
Location012 MI So Delena
RouteCounty Highway C4105
StateOregon
Coordinates46.08116, -123.0744
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating53.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic409 (2020)
Projected traffic451 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Lost CR RD over Lost Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Lost CR RD over Lost 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 May 2023.

How much traffic does Lost CR RD over Lost Creek carry?

About 409 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Lost CR RD over Lost Creek?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.

Who owns Lost CR RD over Lost Creek?

It is owned by the County Highway Agency.