US Bridges

I-15 (SR-15)NB&AMP over Dry Creek

Fair

Washington County, Utah · 0.6 MI No Kolob Can. Int. · Structure no. 0E1128

Built
1959
66 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
22,855
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15)NB&AMP over Dry Creek is a concrete culvert carrying I-15 (SR-15)NB&AMP over Dry Creek in Washington County, Utah. It was built in 1959, so it is 66 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 22,855 vehicles a day, roughly 43% of them trucks, projected to reach 28,569 by 2034. The structure is 25 ft (7.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesI-15 (SR-15)NB&AMP
CrossesDry Creek
Location0.6 MI No Kolob Can. Int.
RouteInterstate 15
CountyWashington County
StateUtah
Coordinates37.46297, -113.22569
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length25 ft (7.7 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,855 (2014)
Projected traffic28,569 by 2034
Trucks43%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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)NB&AMP over Dry Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-15 (SR-15)NB&AMP over Dry Creek 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 January 2025.

How much traffic does I-15 (SR-15)NB&AMP over Dry Creek carry?

About 22,855 vehicles per day (2014 count), of which roughly 43% are trucks.

How long is I-15 (SR-15)NB&AMP over Dry Creek?

The structure is 25 ft (7.7 m) long with a longest span of 24 ft (7.3 m).

Who owns I-15 (SR-15)NB&AMP over Dry Creek?

It is owned by the State Highway Agency.