US Bridges

SR-30 over Union Pacific Railroad

Fair

Box Elder County, Utah · West of Collinston Jct. · Structure no. 0F 342

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
8,042
2022 count
Owner
State
State Highway Agency

About this bridge

SR-30 over Union Pacific Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying SR-30 over Union Pacific Railroad in Box Elder County, Utah. It was built in 1975, so it is 50 years old, older than the Utah average of 40.1 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 8,042 vehicles a day, roughly 29% of them trucks, projected to reach 9,650 by 2042. The structure is 129 ft (39.3 m) long and 40 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesSR-30
CrossesUnion Pacific Railroad
LocationWest of Collinston Jct.
RouteState Highway 30
CountyBox Elder County
StateUtah
Coordinates41.785, -112.09278
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length129 ft (39.3 m)
Longest span46 ft (14.1 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,042 (2022)
Projected traffic9,650 by 2042
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-30 over Union Pacific Railroad built?

It was built in 1975, making it 50 years old in 2025.

What condition is SR-30 over Union Pacific Railroad 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 April 2023.

How much traffic does SR-30 over Union Pacific Railroad carry?

About 8,042 vehicles per day (2022 count), of which roughly 29% are trucks.

How long is SR-30 over Union Pacific Railroad?

The structure is 129 ft (39.3 m) long with a longest span of 46 ft (14.1 m) and a deck 40 ft wide.

Who owns SR-30 over Union Pacific Railroad?

It is owned by the State Highway Agency.