US Bridges

3900 South Street over I-15 (SR-15) Nbl and Sbl

Fair

Salt Lake County, Utah · 300 W.3900 South Sl.Co. · Structure no. 0C 812

Built
1998
27 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
2 main spans
Daily traffic
7,500
2012 count
Owner
State
State Highway Agency

About this bridge

3900 South Street over I-15 (SR-15) Nbl and Sbl is a steel continuous stringer/multi-beam or girder carrying 3900 South Street over I-15 (SR-15) Nbl and Sbl in Salt Lake County, Utah. It was built in 1998, so it is 27 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 7,500 vehicles a day, projected to reach 10,000 by 2034. The structure is 265 ft (80.8 m) long and 91 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries3900 South Street
CrossesI-15 (SR-15) Nbl and Sbl
Location300 W.3900 South Sl.Co.
RouteCounty Highway 2172
CountySalt Lake County
StateUtah
Coordinates40.68676, -111.90332
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.8 US tons
Inventory rating78.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length265 ft (80.8 m)
Longest span133 ft (40.5 m)
Deck width91 ft (27.8 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2012)
Projected traffic10,000 by 2034
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 3900 South Street over I-15 (SR-15) Nbl and Sbl built?

It was built in 1998, making it 27 years old in 2025.

What condition is 3900 South Street over I-15 (SR-15) Nbl and Sbl 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 October 2024.

How much traffic does 3900 South Street over I-15 (SR-15) Nbl and Sbl carry?

About 7,500 vehicles per day (2012 count).

How long is 3900 South Street over I-15 (SR-15) Nbl and Sbl?

The structure is 265 ft (80.8 m) long with a longest span of 133 ft (40.5 m) and a deck 91 ft wide.

Who owns 3900 South Street over I-15 (SR-15) Nbl and Sbl?

It is owned by the State Highway Agency.