US Bridges

I-15 (SR-15) Sbl over Cottonwood Creek

Fair

Washington County, Utah · 3 MI No Harrisburg Inter · Structure no. 3E1301

Built
1963
62 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete Continuous
Length
48 ft
3 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over Cottonwood Creek is a concrete continuous culvert carrying I-15 (SR-15) Sbl over Cottonwood Creek in Washington County, Utah. It was built in 1963, so it is 62 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.

No traffic count is recorded. The structure is 48 ft (14.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15 (SR-15) Sbl
CrossesCottonwood Creek
Location3 MI No Harrisburg Inter
RouteInterstate 15
CountyWashington County
StateUtah
Coordinates37.19274, -113.40718
Functional classUrban 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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating0 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length48 ft (14.5 m)
Longest span17 ft (5.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic—
Projected traffic—
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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) Sbl over Cottonwood Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-15 (SR-15) Sbl over Cottonwood 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 2023.

How much traffic does I-15 (SR-15) Sbl over Cottonwood Creek carry?

No traffic count is recorded for this structure.

How long is I-15 (SR-15) Sbl over Cottonwood Creek?

The structure is 48 ft (14.5 m) long with a longest span of 17 ft (5.1 m).

Who owns I-15 (SR-15) Sbl over Cottonwood Creek?

It is owned by the State Highway Agency.