US Bridges

I-15 (SR-15) Nbl over SR-21 Beaver Center St.

Fair

Beaver County, Utah · West Side of Beaver · Structure no. 1D 767

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
105 ft
3 main spans
Daily traffic
23,081
2021 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over SR-21 Beaver Center St. is a concrete continuous tee beam carrying I-15 (SR-15) Nbl over SR-21 Beaver Center St. in Beaver County, Utah. It was built in 1970, so it is 55 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 23,081 vehicles a day, roughly 44% of them trucks, projected to reach 27,697 by 2041. The structure is 105 ft (32.1 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Nbl
CrossesSR-21 Beaver Center St.
LocationWest Side of Beaver
RouteInterstate 15
CountyBeaver County
StateUtah
Coordinates38.27398, -112.65017
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length105 ft (32.1 m)
Longest span40 ft (12.3 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,081 (2021)
Projected traffic27,697 by 2041
Trucks44%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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) Nbl over SR-21 Beaver Center St. built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-15 (SR-15) Nbl over SR-21 Beaver Center St. 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 February 2023.

How much traffic does I-15 (SR-15) Nbl over SR-21 Beaver Center St. carry?

About 23,081 vehicles per day (2021 count), of which roughly 44% are trucks.

How long is I-15 (SR-15) Nbl over SR-21 Beaver Center St.?

The structure is 105 ft (32.1 m) long with a longest span of 40 ft (12.3 m) and a deck 41 ft wide.

Who owns I-15 (SR-15) Nbl over SR-21 Beaver Center St.?

It is owned by the State Highway Agency.