US Bridges

I 90 Wbl over Cda Lake;blue Creek Bay

Fair

Kootenai County, Idaho · 7.7 E. Coeur Dalene · Structure no. 000000000016910

Built
1951
74 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,310 ft
10 main spans
Daily traffic
8,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 Wbl over Cda Lake;blue Creek Bay is a steel continuous stringer/multi-beam or girder carrying I 90 Wbl over Cda Lake;blue Creek Bay in Kootenai County, Idaho. It was built in 1951, so it is 74 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 8,750 vehicles a day, roughly 13% of them trucks, projected to reach 13,125 by 2042. The structure is 1,310 ft (399.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90 Wbl
CrossesCda Lake;blue Creek Bay
Location7.7 E. Coeur Dalene
RouteInterstate 90
CountyKootenai County
StateIdaho
Coordinates47.62667, -116.67455
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length1,310 ft (399.3 m)
Longest span123 ft (37.4 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,750 (2023)
Projected traffic13,125 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I 90 Wbl over Cda Lake;blue Creek Bay built?

It was built in 1951, making it 74 years old in 2025.

What condition is I 90 Wbl over Cda Lake;blue Creek Bay 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 Cda Lake;blue Creek Bay carry?

About 8,750 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is I 90 Wbl over Cda Lake;blue Creek Bay?

The structure is 1,310 ft (399.3 m) long with a longest span of 123 ft (37.4 m) and a deck 42 ft wide.

Who owns I 90 Wbl over Cda Lake;blue Creek Bay?

It is owned by the State Highway Agency.