US Bridges

SH 97 over Coeur Dalene River

Fair

Kootenai County, Idaho · 0.6 N. Harrison · Structure no. 000000000018901

Built
2007
18 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
606 ft
4 main spans
Daily traffic
820
2023 count
Owner
State
State Highway Agency

About this bridge

SH 97 over Coeur Dalene River is a steel continuous stringer/multi-beam or girder carrying SH 97 over Coeur Dalene River in Kootenai County, Idaho. It was built in 2007, so it is 18 years old, younger 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 820 vehicles a day, roughly 8% of them trucks, projected to reach 1,230 by 2042. The structure is 606 ft (184.7 m) long and 46 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesSH 97
CrossesCoeur Dalene River
Location0.6 N. Harrison
RouteState Highway 97
CountyKootenai County
StateIdaho
Coordinates47.46428, -116.76531
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length606 ft (184.7 m)
Longest span195 ft (59.4 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2023)
Projected traffic1,230 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$356,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SH 97 over Coeur Dalene River built?

It was built in 2007, making it 18 years old in 2025.

What condition is SH 97 over Coeur Dalene River 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 2024.

How much traffic does SH 97 over Coeur Dalene River carry?

About 820 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SH 97 over Coeur Dalene River?

The structure is 606 ft (184.7 m) long with a longest span of 195 ft (59.4 m) and a deck 46 ft wide.

Who owns SH 97 over Coeur Dalene River?

It is owned by the State Highway Agency.