US Bridges

I-15NB. (SR-15) over Wildlife Underpass

Fair

Beaver County, Utah · 3.7MI.NO.MANDERFIELD Int. · Structure no. 1V2066

Built
2005
20 years old, rebuilt 2015
Condition
Fair
inspected February 2023
Type
Culvert
Steel
Length
27 ft
1 main span
Daily traffic
24,123
2021 count
Owner
State
State Highway Agency

About this bridge

I-15NB. (SR-15) over Wildlife Underpass is a steel culvert carrying I-15NB. (SR-15) over Wildlife Underpass in Beaver County, Utah. It was built in 2005 and reconstructed in 2015, so it is 20 years old, younger 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 24,123 vehicles a day, roughly 31% of them trucks, projected to reach 28,948 by 2041. The structure is 27 ft (8.3 m) long.

Location

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CarriesI-15NB. (SR-15)
CrossesWildlife Underpass
Location3.7MI.NO.MANDERFIELD Int.
RouteInterstate 15
CountyBeaver County
StateUtah
Coordinates38.45696, -112.62217
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length27 ft (8.3 m)
Longest span27 ft (8.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,123 (2021)
Projected traffic28,948 by 2041
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-15NB. (SR-15) over Wildlife Underpass built?

It was built in 2005, making it 20 years old in 2025. It was reconstructed in 2015.

What condition is I-15NB. (SR-15) over Wildlife Underpass 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-15NB. (SR-15) over Wildlife Underpass carry?

About 24,123 vehicles per day (2021 count), of which roughly 31% are trucks.

How long is I-15NB. (SR-15) over Wildlife Underpass?

The structure is 27 ft (8.3 m) long with a longest span of 27 ft (8.3 m).

Who owns I-15NB. (SR-15) over Wildlife Underpass?

It is owned by the State Highway Agency.