US Bridges

SH 3 over Rose Lake Overpass

Fair

Kootenai County, Idaho · 3.1 S. Rose Lake · Structure no. 000000000010136

Built
1997
28 years old, rebuilt 2015
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
257 ft
3 main spans
Daily traffic
1,900
2023 count
Owner
State
State Highway Agency

About this bridge

SH 3 over Rose Lake Overpass is a prestressed concrete stringer/multi-beam or girder carrying SH 3 over Rose Lake Overpass in Kootenai County, Idaho. It was built in 1997 and reconstructed in 2015, 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 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 1,900 vehicles a day, roughly 17% of them trucks, projected to reach 2,850 by 2042. The structure is 257 ft (78.3 m) long and 40 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesSH 3
CrossesRose Lake Overpass
Location3.1 S. Rose Lake
RouteState Highway 3
StateIdaho
Coordinates47.52178, -116.51528
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 rating103.9 US tons
Inventory rating52 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length257 ft (78.3 m)
Longest span89 ft (27.1 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
CrossesPedestrian / bicycle
Detour if closed23 mi (37 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 3 over Rose Lake Overpass built?

It was built in 1997, making it 28 years old in 2025. It was reconstructed in 2015.

What condition is SH 3 over Rose Lake Overpass 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 July 2023.

How much traffic does SH 3 over Rose Lake Overpass carry?

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

How long is SH 3 over Rose Lake Overpass?

The structure is 257 ft (78.3 m) long with a longest span of 89 ft (27.1 m) and a deck 40 ft wide.

Who owns SH 3 over Rose Lake Overpass?

It is owned by the State Highway Agency.