US Bridges

SR-75 Int. X-Rd. over I-15 (SR-15)

Good

Utah County, Utah · At the Ironton Interchang · Structure no. 0F 681

Built
2006
19 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
212 ft
2 main spans
Daily traffic
11,826
2022 count
Owner
State
State Highway Agency

About this bridge

SR-75 Int. X-Rd. over I-15 (SR-15) is a prestressed concrete stringer/multi-beam or girder carrying SR-75 Int. X-Rd. over I-15 (SR-15) in Utah County, Utah. It was built in 2006, so it is 19 years old, younger than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,826 vehicles a day, roughly 14% of them trucks, projected to reach 14,191 by 2042. The structure is 212 ft (64.6 m) long and 90 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR-75 Int. X-Rd.
CrossesI-15 (SR-15)
LocationAt the Ironton Interchang
RouteState Highway 75
CountyUtah County
StateUtah
Coordinates40.18776, -111.64701
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length212 ft (64.6 m)
Longest span106 ft (32.3 m)
Deck width90 ft (27.4 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,826 (2022)
Projected traffic14,191 by 2042
Trucks14%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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-75 Int. X-Rd. over I-15 (SR-15) built?

It was built in 2006, making it 19 years old in 2025.

What condition is SR-75 Int. X-Rd. over I-15 (SR-15) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does SR-75 Int. X-Rd. over I-15 (SR-15) carry?

About 11,826 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is SR-75 Int. X-Rd. over I-15 (SR-15)?

The structure is 212 ft (64.6 m) long with a longest span of 106 ft (32.3 m) and a deck 90 ft wide.

Who owns SR-75 Int. X-Rd. over I-15 (SR-15)?

It is owned by the State Highway Agency.