US Bridges

SR-34 Int.X-Road over I-15 (SR-15) Nbl & S

Fair

Washington County, Utah · East St. George Intchange · Structure no. 0F 290

Built
1972
53 years old, rebuilt 2013
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
256 ft
4 main spans
Daily traffic
54,703
2022 count
Owner
State
State Highway Agency

About this bridge

SR-34 Int.X-Road over I-15 (SR-15) Nbl & S is a prestressed concrete stringer/multi-beam or girder carrying SR-34 Int.X-Road over I-15 (SR-15) Nbl & S in Washington County, Utah. It was built in 1972 and reconstructed in 2013, so it is 53 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 54,703 vehicles a day, roughly 14% of them trucks, projected to reach 65,644 by 2042. The structure is 256 ft (77.9 m) long and 108 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR-34 Int.X-Road
CrossesI-15 (SR-15) Nbl & S
LocationEast St. George Intchange
RouteState Highway 34
CountyWashington County
StateUtah
Coordinates37.1098, -113.55876
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length256 ft (77.9 m)
Longest span92 ft (28 m)
Deck width108 ft (32.9 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,703 (2022)
Projected traffic65,644 by 2042
Trucks14%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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-34 Int.X-Road over I-15 (SR-15) Nbl & S built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2013.

What condition is SR-34 Int.X-Road over I-15 (SR-15) Nbl & S 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 SR-34 Int.X-Road over I-15 (SR-15) Nbl & S carry?

About 54,703 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is SR-34 Int.X-Road over I-15 (SR-15) Nbl & S?

The structure is 256 ft (77.9 m) long with a longest span of 92 ft (28 m) and a deck 108 ft wide.

Who owns SR-34 Int.X-Road over I-15 (SR-15) Nbl & S?

It is owned by the State Highway Agency.