US Bridges

Stc 4718;SELWAY RD over Lochsa River(lowell Br)

Fair

Idaho County, Idaho · 0.1 N. 18.2 E. Kooskia · Structure no. 000000000029285

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
318 ft
5 main spans
Daily traffic
320
2023 count
Owner
Local
Other Local Agency

About this bridge

Stc 4718;SELWAY RD over Lochsa River(lowell Br) is a steel stringer/multi-beam or girder carrying Stc 4718;SELWAY RD over Lochsa River(lowell Br) in Idaho County, Idaho. It was built in 1960, so it is 65 years old, older than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 320 vehicles a day, roughly 10% of them trucks, projected to reach 480 by 2042. The structure is 318 ft (96.9 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesStc 4718;SELWAY RD
CrossesLochsa River(lowell Br)
Location0.1 N. 18.2 E. Kooskia
RouteCounty Highway 4718
CountyIdaho County
StateIdaho
Coordinates46.14302, -115.59727
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length318 ft (96.9 m)
Longest span98 ft (29.9 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2023)
Projected traffic480 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 4718;SELWAY RD over Lochsa River(lowell Br) built?

It was built in 1960, making it 65 years old in 2025.

What condition is Stc 4718;SELWAY RD over Lochsa River(lowell Br) 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 2024.

How much traffic does Stc 4718;SELWAY RD over Lochsa River(lowell Br) carry?

About 320 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Stc 4718;SELWAY RD over Lochsa River(lowell Br)?

The structure is 318 ft (96.9 m) long with a longest span of 98 ft (29.9 m) and a deck 31 ft wide.

Who owns Stc 4718;SELWAY RD over Lochsa River(lowell Br)?

It is owned by the Other Local Agency.