US Bridges

I-15 NB over Deer Crossing|county Roa

Fair

Juab County, Utah · Millard-Juab County Line · Structure no. 1F 438

Built
1983
42 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
13,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 NB over Deer Crossing|county Roa is a prestressed concrete stringer/multi-beam or girder carrying I-15 NB over Deer Crossing|county Roa in Juab County, Utah. It was built in 1983, so it is 42 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 5 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 13,000 vehicles a day, roughly 32% of them trucks, projected to reach 12,150 by 2034. The structure is 61 ft (18.7 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15 NB
CrossesDeer Crossing|county Roa
LocationMillard-Juab County Line
RouteInterstate 15
CountyJuab County
StateUtah
Coordinates39.33166, -112.08166
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length61 ft (18.7 m)
Longest span59 ft (18.1 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2023)
Projected traffic12,150 by 2034
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 NB over Deer Crossing|county Roa built?

It was built in 1983, making it 42 years old in 2025.

What condition is I-15 NB over Deer Crossing|county Roa 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 I-15 NB over Deer Crossing|county Roa carry?

About 13,000 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I-15 NB over Deer Crossing|county Roa?

The structure is 61 ft (18.7 m) long with a longest span of 59 ft (18.1 m) and a deck 44 ft wide.

Who owns I-15 NB over Deer Crossing|county Roa?

It is owned by the State Highway Agency.