US Bridges

Center Street over I-15 (SR-15) Nbl and Sbl

Fair

Iron County, Utah · In Cedar City · Structure no. 0C 565

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
211 ft
2 main spans
Daily traffic
8,534
2017 count
Owner
State
State Highway Agency

About this bridge

Center Street over I-15 (SR-15) Nbl and Sbl is a steel continuous stringer/multi-beam or girder carrying Center Street over I-15 (SR-15) Nbl and Sbl in Iron County, Utah. It was built in 1968, 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 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 8,534 vehicles a day, projected to reach 10,241 by 2037. The structure is 211 ft (64.3 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCenter Street
CrossesI-15 (SR-15) Nbl and Sbl
LocationIn Cedar City
RouteCity Street 1768
CountyIron County
StateUtah
Coordinates37.67701, -113.08028
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 alignment6: Equal to present minimum criteria
Operating rating37.5 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length211 ft (64.3 m)
Longest span117 ft (35.7 m)
Deck width41 ft (12.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,534 (2017)
Projected traffic10,241 by 2037
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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

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

What condition is Center Street over I-15 (SR-15) Nbl and Sbl 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 Center Street over I-15 (SR-15) Nbl and Sbl carry?

About 8,534 vehicles per day (2017 count).

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

The structure is 211 ft (64.3 m) long with a longest span of 117 ft (35.7 m) and a deck 41 ft wide.

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

It is owned by the State Highway Agency.