US Bridges

9th ST over I 90 EB-WB;9th ST Gs

Fair

Kootenai County, Idaho · In Coeur Dalene · Structure no. 000000000021400

Built
1960
65 years old, rebuilt 2009
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
2 main spans
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

9th ST over I 90 EB-WB;9th ST Gs is a steel continuous stringer/multi-beam or girder carrying 9th ST over I 90 EB-WB;9th ST Gs in Kootenai County, Idaho. It was built in 1960 and reconstructed in 2009, 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 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 2,400 vehicles a day, projected to reach 3,600 by 2042. The structure is 229 ft (69.8 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries9th ST
CrossesI 90 EB-WB;9th ST Gs
LocationIn Coeur Dalene
RouteCity Street 0
CountyKootenai County
StateIdaho
Coordinates47.69517, -116.77299
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length229 ft (69.8 m)
Longest span71 ft (21.6 m)
Deck width50 ft (15.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic3,600 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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$3 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 9th ST over I 90 EB-WB;9th ST Gs built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is 9th ST over I 90 EB-WB;9th ST Gs 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 April 2023.

How much traffic does 9th ST over I 90 EB-WB;9th ST Gs carry?

About 2,400 vehicles per day (2023 count).

How long is 9th ST over I 90 EB-WB;9th ST Gs?

The structure is 229 ft (69.8 m) long with a longest span of 71 ft (21.6 m) and a deck 50 ft wide.

Who owns 9th ST over I 90 EB-WB;9th ST Gs?

It is owned by the State Highway Agency.