US Bridges

I-15 (SR-15) Nbl over County Access Road

Fair

Beaver County, Utah · 5 Mi. S. of Beaver · Structure no. 1F 397

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
99 ft
1 main span
Daily traffic
25,503
2017 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over County Access Road is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over County Access Road in Beaver County, Utah. It was built in 1975, so it is 50 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 25,503 vehicles a day, roughly 44% of them trucks, projected to reach 30,604 by 2037. The structure is 99 ft (30.1 m) long and 44 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
CrossesCounty Access Road
Location5 Mi. S. of Beaver
RouteInterstate 15
CountyBeaver County
StateUtah
Coordinates38.18737, -112.63747
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length99 ft (30.1 m)
Longest span95 ft (28.9 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,503 (2017)
Projected traffic30,604 by 2037
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 County Access Road built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-15 (SR-15) Nbl over County Access 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 February 2023.

How much traffic does I-15 (SR-15) Nbl over County Access Road carry?

About 25,503 vehicles per day (2017 count), of which roughly 44% are trucks.

How long is I-15 (SR-15) Nbl over County Access Road?

The structure is 99 ft (30.1 m) long with a longest span of 95 ft (28.9 m) and a deck 44 ft wide.

Who owns I-15 (SR-15) Nbl over County Access Road?

It is owned by the State Highway Agency.