US Bridges

Johnson RD over Lost River

Good

Klamath County, Oregon · 010 MI E of W Langell Vly · Structure no. 21911 121700100

Built
2015
10 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
32
2020 count
Owner
County
County Highway Agency

About this bridge

Johnson RD over Lost River is a prestressed concrete box beam or girders - multiple carrying Johnson RD over Lost River in Klamath County, Oregon. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 32 vehicles a day, roughly 10% of them trucks, projected to reach 37 by 2025. The structure is 76 ft (23.3 m) long and 20 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesJohnson RD
CrossesLost River
Location010 MI E of W Langell Vly
RouteCounty Highway C1217
StateOregon
Coordinates42.04948, -121.23197
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating51 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length76 ft (23.3 m)
Longest span75 ft (23 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2020)
Projected traffic37 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 Johnson RD over Lost River built?

It was built in 2015, making it 10 years old in 2025.

What condition is Johnson RD over Lost River 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 March 2023.

How much traffic does Johnson RD over Lost River carry?

About 32 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Johnson RD over Lost River?

The structure is 76 ft (23.3 m) long with a longest span of 75 ft (23 m) and a deck 20 ft wide.

Who owns Johnson RD over Lost River?

It is owned by the County Highway Agency.