US Bridges

I 84B over I 84 Wb-Eb;n.Hammett Ic

Fair

Elmore County, Idaho · 1.1 N. Hammett · Structure no. 000000000013775

Built
1973
52 years old
Condition
Fair
inspected March 2021
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
339 ft
2 main spans
Daily traffic
440
2023 count
Owner
State
State Highway Agency

About this bridge

I 84B over I 84 Wb-Eb;n.Hammett Ic is a steel continuous stringer/multi-beam or girder carrying I 84B over I 84 Wb-Eb;n.Hammett Ic in Elmore County, Idaho. It was built in 1973, so it is 52 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 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 440 vehicles a day, roughly 10% of them trucks, projected to reach 660 by 2042. The structure is 339 ft (103.3 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI 84B
CrossesI 84 Wb-Eb;n.Hammett Ic
Location1.1 N. Hammett
RouteInterstate 84
CountyElmore County
StateIdaho
Coordinates42.95908, -115.46325
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length339 ft (103.3 m)
Longest span126 ft (38.4 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2023)
Projected traffic660 by 2042
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.5 million (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 84B over I 84 Wb-Eb;n.Hammett Ic built?

It was built in 1973, making it 52 years old in 2025.

What condition is I 84B over I 84 Wb-Eb;n.Hammett 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 I 84B over I 84 Wb-Eb;n.Hammett Ic carry?

About 440 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I 84B over I 84 Wb-Eb;n.Hammett Ic?

The structure is 339 ft (103.3 m) long with a longest span of 126 ft (38.4 m) and a deck 40 ft wide.

Who owns I 84B over I 84 Wb-Eb;n.Hammett Ic?

It is owned by the State Highway Agency.