US Bridges

I-15NB (SR-15) over Co.Rd. W of Manderfield

Good

Beaver County, Utah · 4.6 Mi. N. of Beaver · Structure no. 1F 853

Built
2013
12 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
24,161
2022 count
Owner
State
State Highway Agency

About this bridge

I-15NB (SR-15) over Co.Rd. W of Manderfield is a prestressed concrete stringer/multi-beam or girder carrying I-15NB (SR-15) over Co.Rd. W of Manderfield in Beaver County, Utah. It was built in 2013, so it is 12 years old, younger than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,161 vehicles a day, roughly 30% of them trucks, projected to reach 28,993 by 2042. The structure is 78 ft (23.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15NB (SR-15)
CrossesCo.Rd. W of Manderfield
Location4.6 Mi. N. of Beaver
RouteInterstate 15
CountyBeaver County
StateUtah
Coordinates38.35931, -112.66119
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length78 ft (23.8 m)
Longest span74 ft (22.6 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,161 (2022)
Projected traffic28,993 by 2042
Trucks30%
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 NetworkSTRAHNET connector

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-15NB (SR-15) over Co.Rd. W of Manderfield built?

It was built in 2013, making it 12 years old in 2025.

What condition is I-15NB (SR-15) over Co.Rd. W of Manderfield in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does I-15NB (SR-15) over Co.Rd. W of Manderfield carry?

About 24,161 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is I-15NB (SR-15) over Co.Rd. W of Manderfield?

The structure is 78 ft (23.8 m) long with a longest span of 74 ft (22.6 m) and a deck 45 ft wide.

Who owns I-15NB (SR-15) over Co.Rd. W of Manderfield?

It is owned by the State Highway Agency.