US Bridges

I 90 Wbl over Sma 7335;FIFTEENTH St.Ic

Fair

Kootenai County, Idaho · In Coeur DALENE;15th St. · Structure no. 000000000016860

Built
1960
65 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
12,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Wbl over Sma 7335;FIFTEENTH St.Ic is a prestressed concrete stringer/multi-beam or girder carrying I 90 Wbl over Sma 7335;FIFTEENTH St.Ic in Kootenai 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 12,750 vehicles a day, roughly 18% of them trucks, projected to reach 19,125 by 2042. The structure is 104 ft (31.7 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 Wbl
CrossesSma 7335;FIFTEENTH St.Ic
LocationIn Coeur DALENE;15th St.
RouteInterstate 90
CountyKootenai County
StateIdaho
Coordinates47.68862, -116.76475
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span104 ft (31.7 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,750 (2023)
Projected traffic19,125 by 2042
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$1.4 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 90 Wbl over Sma 7335;FIFTEENTH St.Ic built?

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

What condition is I 90 Wbl over Sma 7335;FIFTEENTH St.Ic 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 March 2024.

How much traffic does I 90 Wbl over Sma 7335;FIFTEENTH St.Ic carry?

About 12,750 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I 90 Wbl over Sma 7335;FIFTEENTH St.Ic?

The structure is 104 ft (31.7 m) long with a longest span of 104 ft (31.7 m) and a deck 40 ft wide.

Who owns I 90 Wbl over Sma 7335;FIFTEENTH St.Ic?

It is owned by the State Highway Agency.