US Bridges

US 95 over Salmon R.;mckinzie Br.

Fair

Idaho County, Idaho · 7.7 S. Whitebird · Structure no. 000000000018350

Built
1969
56 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
703 ft
5 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

US 95 over Salmon R.;mckinzie Br. is a steel continuous stringer/multi-beam or girder carrying US 95 over Salmon R.;mckinzie Br. in Idaho County, Idaho. It was built in 1969, so it is 56 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 5 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 2,200 vehicles a day, roughly 63% of them trucks, projected to reach 3,300 by 2042. The structure is 703 ft (214.3 m) long and 37 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS 95
CrossesSalmon R.;mckinzie Br.
Location7.7 S. Whitebird
RouteU.S. Route 95
CountyIdaho County
StateIdaho
Coordinates45.6618, -116.2916
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length703 ft (214.3 m)
Longest span185 ft (56.4 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic3,300 by 2042
Trucks63%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.7 million (2017 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 95 over Salmon R.;mckinzie Br. built?

It was built in 1969, making it 56 years old in 2025.

What condition is US 95 over Salmon R.;mckinzie 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 February 2024.

How much traffic does US 95 over Salmon R.;mckinzie Br. carry?

About 2,200 vehicles per day (2023 count), of which roughly 63% are trucks.

How long is US 95 over Salmon R.;mckinzie Br.?

The structure is 703 ft (214.3 m) long with a longest span of 185 ft (56.4 m) and a deck 37 ft wide.

Who owns US 95 over Salmon R.;mckinzie Br.?

It is owned by the State Highway Agency.