US Bridges

Compressor Road over I 90;COMPRESSOR Ic

Fair

Shoshone County, Idaho · 3.5 E. Wallace · Structure no. 000000000030955

Built
1963
62 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
266 ft
6 main spans
Daily traffic
20
2023 count
Owner
State
State Highway Agency

About this bridge

Compressor Road over I 90;COMPRESSOR Ic is a prestressed concrete stringer/multi-beam or girder carrying Compressor Road over I 90;COMPRESSOR Ic in Shoshone County, Idaho. It was built in 1963, so it is 62 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 20 vehicles a day, projected to reach 30 by 2042. The structure is 266 ft (81.1 m) long and 33 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCompressor Road
CrossesI 90;COMPRESSOR Ic
Location3.5 E. Wallace
RouteCounty Highway 0
CountyShoshone County
StateIdaho
Coordinates47.46886, -115.85019
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length266 ft (81.1 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2023)
Projected traffic30 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and waterway
Detour if closed98.8 mi (159 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$2.6 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Compressor Road over I 90;COMPRESSOR Ic built?

It was built in 1963, making it 62 years old in 2025.

What condition is Compressor Road over I 90;COMPRESSOR 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 June 2024.

How much traffic does Compressor Road over I 90;COMPRESSOR Ic carry?

About 20 vehicles per day (2023 count).

How long is Compressor Road over I 90;COMPRESSOR Ic?

The structure is 266 ft (81.1 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Compressor Road over I 90;COMPRESSOR Ic?

It is owned by the State Highway Agency.