US Bridges

I 84B over Uprr;n.Hammett RR Op

Fair

Elmore County, Idaho · 0.5 N. Hammett · Structure no. 000000000013780

Built
1973
52 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
680
2023 count
Owner
State
State Highway Agency

About this bridge

I 84B over Uprr;n.Hammett RR Op is a prestressed concrete stringer/multi-beam or girder carrying I 84B over Uprr;n.Hammett RR Op 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 680 vehicles a day, roughly 8% of them trucks, projected to reach 1,020 by 2042. The structure is 192 ft (58.5 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 84B
CrossesUprr;n.Hammett RR Op
Location0.5 N. Hammett
RouteInterstate 84
CountyElmore County
StateIdaho
Coordinates42.95058, -115.46725
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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 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 rating59 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span85 ft (25.9 m)
Deck width38 ft (11.5 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic680 (2023)
Projected traffic1,020 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 I 84B over Uprr;n.Hammett RR Op built?

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

What condition is I 84B over Uprr;n.Hammett RR Op 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 2023.

How much traffic does I 84B over Uprr;n.Hammett RR Op carry?

About 680 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is I 84B over Uprr;n.Hammett RR Op?

The structure is 192 ft (58.5 m) long with a longest span of 85 ft (25.9 m) and a deck 38 ft wide.

Who owns I 84B over Uprr;n.Hammett RR Op?

It is owned by the State Highway Agency.