US Bridges

I-15 (SR-15) Sbl over SR-56 200 North Street

Fair

Iron County, Utah · Cedar City Interchange · Structure no. 3F 119

Built
1968
57 years old, rebuilt 1993
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
157 ft
3 main spans
Daily traffic
35,848
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over SR-56 200 North Street is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Sbl over SR-56 200 North Street in Iron County, Utah. It was built in 1968 and reconstructed in 1993, 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 fair condition with a lowest component rating of 5 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 35,848 vehicles a day, roughly 44% of them trucks, projected to reach 43,018 by 2043. The structure is 157 ft (47.8 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Sbl
CrossesSR-56 200 North Street
LocationCedar City Interchange
RouteInterstate 15
CountyIron County
StateUtah
Coordinates37.68111, -113.07972
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length157 ft (47.8 m)
Longest span79 ft (24.1 m)
Deck width53 ft (16.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,848 (2023)
Projected traffic43,018 by 2043
Trucks44%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
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-56 200 North Street built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1993.

What condition is I-15 (SR-15) Sbl over SR-56 200 North Street 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 March 2023.

How much traffic does I-15 (SR-15) Sbl over SR-56 200 North Street carry?

About 35,848 vehicles per day (2023 count), of which roughly 44% are trucks.

How long is I-15 (SR-15) Sbl over SR-56 200 North Street?

The structure is 157 ft (47.8 m) long with a longest span of 79 ft (24.1 m) and a deck 53 ft wide.

Who owns I-15 (SR-15) Sbl over SR-56 200 North Street?

It is owned by the State Highway Agency.