US Bridges

SH 3 over Cda River;rose Lake

Fair

Kootenai County, Idaho · 3.0 S. Rose Lake · Structure no. 000000000010141

Built
1997
28 years old
Condition
Fair
inspected April 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
431 ft
3 main spans
Daily traffic
1,900
2023 count
Owner
State
State Highway Agency

About this bridge

SH 3 over Cda River;rose Lake is a steel continuous stringer/multi-beam or girder carrying SH 3 over Cda River;rose Lake in Kootenai County, Idaho. It was built in 1997, so it is 28 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 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 1,900 vehicles a day, roughly 17% of them trucks, projected to reach 2,850 by 2042. The structure is 431 ft (131.4 m) long and 40 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesSH 3
CrossesCda River;rose Lake
Location3.0 S. Rose Lake
RouteState Highway 3
CountyKootenai County
StateIdaho
Coordinates47.52314, -116.51478
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length431 ft (131.4 m)
Longest span165 ft (50.3 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2023)
Projected traffic2,850 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SH 3 over Cda River;rose Lake built?

It was built in 1997, making it 28 years old in 2025.

What condition is SH 3 over Cda River;rose Lake 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 2022.

How much traffic does SH 3 over Cda River;rose Lake carry?

About 1,900 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is SH 3 over Cda River;rose Lake?

The structure is 431 ft (131.4 m) long with a longest span of 165 ft (50.3 m) and a deck 40 ft wide.

Who owns SH 3 over Cda River;rose Lake?

It is owned by the State Highway Agency.