US Bridges

12400 South over I-15 (SR-15) Nbl & S

Fair

Utah County, Utah · 2.1 MI No of Santaquin · Structure no. 0D 749

Built
1967
58 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
191 ft
4 main spans
Daily traffic
2,204
2023 count
Owner
State
State Highway Agency

About this bridge

12400 South over I-15 (SR-15) Nbl & S is a concrete continuous tee beam carrying 12400 South over I-15 (SR-15) Nbl & S in Utah County, Utah. It was built in 1967, so it is 58 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 2,204 vehicles a day, projected to reach 2,645 by 2043. The structure is 191 ft (58.2 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries12400 South
CrossesI-15 (SR-15) Nbl & S
Location2.1 MI No of Santaquin
RouteCounty Highway 2854
CountyUtah County
StateUtah
Coordinates40.00472, -111.7625
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating47.2 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length191 ft (58.2 m)
Longest span70 ft (21.3 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,204 (2023)
Projected traffic2,645 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 12400 South over I-15 (SR-15) Nbl & S built?

It was built in 1967, making it 58 years old in 2025.

What condition is 12400 South over I-15 (SR-15) Nbl & S 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 12400 South over I-15 (SR-15) Nbl & S carry?

About 2,204 vehicles per day (2023 count).

How long is 12400 South over I-15 (SR-15) Nbl & S?

The structure is 191 ft (58.2 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.

Who owns 12400 South over I-15 (SR-15) Nbl & S?

It is owned by the State Highway Agency.