US Bridges

I-15 (SR-15) Sbl over SR-17 Intchg. X-Road

Fair

Washington County, Utah · Anderson Ranch Interchg. · Structure no. 3D 630

Built
1959
66 years old, rebuilt 2011
Condition
Fair
inspected January 2023
Type
Tee Beam
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
31,827
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over SR-17 Intchg. X-Road is a concrete continuous tee beam carrying I-15 (SR-15) Sbl over SR-17 Intchg. X-Road in Washington County, Utah. It was built in 1959 and reconstructed in 2011, so it is 66 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 31,827 vehicles a day, roughly 29% of them trucks, projected to reach 38,192 by 2043. The structure is 130 ft (39.6 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI-15 (SR-15) Sbl
CrossesSR-17 Intchg. X-Road
LocationAnderson Ranch Interchg.
RouteInterstate 15
CountyWashington County
StateUtah
Coordinates37.28399, -113.30645
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating34.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length130 ft (39.6 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,827 (2023)
Projected traffic38,192 by 2043
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-15 (SR-15) Sbl over SR-17 Intchg. X-Road built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2011.

What condition is I-15 (SR-15) Sbl over SR-17 Intchg. X-Road 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 January 2023.

How much traffic does I-15 (SR-15) Sbl over SR-17 Intchg. X-Road carry?

About 31,827 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I-15 (SR-15) Sbl over SR-17 Intchg. X-Road?

The structure is 130 ft (39.6 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns I-15 (SR-15) Sbl over SR-17 Intchg. X-Road?

It is owned by the State Highway Agency.