US Bridges

SR-126 over I-15 (SR-15) Nbl and Sbl

Poor

Box Elder County, Utah · 4200 N 2350 W · Structure no. 0C 481

Built
1968
57 years old, rebuilt 1996
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
285 ft
4 main spans
Daily traffic
8,412
2017 count
Owner
State
State Highway Agency

About this bridge

SR-126 over I-15 (SR-15) Nbl and Sbl is a steel stringer/multi-beam or girder carrying SR-126 over I-15 (SR-15) Nbl and Sbl in Box Elder County, Utah. It was built in 1968 and reconstructed in 1996, so it is 57 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 8,412 vehicles a day, roughly 29% of them trucks, projected to reach 10,094 by 2037. The structure is 285 ft (86.9 m) long and 55 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR-126
CrossesI-15 (SR-15) Nbl and Sbl
Location4200 N 2350 W
RouteState Highway 126
CountyBox Elder County
StateUtah
Coordinates41.34028, -112.03722
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.3 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length285 ft (86.9 m)
Longest span121 ft (36.9 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic8,412 (2017)
Projected traffic10,094 by 2037
Trucks29%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

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-126 over I-15 (SR-15) Nbl and Sbl built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1996.

What condition is SR-126 over I-15 (SR-15) Nbl and Sbl in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does SR-126 over I-15 (SR-15) Nbl and Sbl carry?

About 8,412 vehicles per day (2017 count), of which roughly 29% are trucks.

How long is SR-126 over I-15 (SR-15) Nbl and Sbl?

The structure is 285 ft (86.9 m) long with a longest span of 121 ft (36.9 m) and a deck 55 ft wide.

Who owns SR-126 over I-15 (SR-15) Nbl and Sbl?

It is owned by the State Highway Agency.