US Bridges

Alder Creek RD over I90;FOURTH of July Sm Ic

Fair

Kootenai County, Idaho · 15.7 E. Couer Dalene · Structure no. 000000000030645

Built
1988
37 years old
Condition
Fair
inspected March 2021
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
267 ft
2 main spans
Daily traffic
140
2023 count
Owner
State
State Highway Agency

About this bridge

Alder Creek RD over I90;FOURTH of July Sm Ic is a prestressed concrete continuous box beam or girders - single or spread carrying Alder Creek RD over I90;FOURTH of July Sm Ic in Kootenai County, Idaho. It was built in 1988, so it is 37 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 140 vehicles a day, projected to reach 210 by 2042. The structure is 267 ft (81.4 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesAlder Creek RD
CrossesI90;FOURTH of July Sm Ic
Location15.7 E. Couer Dalene
RouteCounty Highway 0
CountyKootenai County
StateIdaho
Coordinates47.62147, -116.52486
Functional classRural 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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length267 ft (81.4 m)
Longest span138 ft (42.1 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2023)
Projected traffic210 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 Alder Creek RD over I90;FOURTH of July Sm Ic built?

It was built in 1988, making it 37 years old in 2025.

What condition is Alder Creek RD over I90;FOURTH of July Sm Ic 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 2021.

How much traffic does Alder Creek RD over I90;FOURTH of July Sm Ic carry?

About 140 vehicles per day (2023 count).

How long is Alder Creek RD over I90;FOURTH of July Sm Ic?

The structure is 267 ft (81.4 m) long with a longest span of 138 ft (42.1 m) and a deck 40 ft wide.

Who owns Alder Creek RD over I90;FOURTH of July Sm Ic?

It is owned by the State Highway Agency.