US Bridges

I124 Sbl over W. 9th St. (fau 3551)

Good

Hamilton County, Tennessee · 3 MI S of Tn River · Structure no. 33I01240014

Built
2020
5 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
138 ft
1 main span
Daily traffic
64,726
2021 count
Owner
State
State Highway Agency

About this bridge

I124 Sbl over W. 9th St. (fau 3551) is a prestressed concrete stringer/multi-beam or girder carrying I124 Sbl over W. 9th St. (fau 3551) in Hamilton County, Tennessee. It was built in 2020, so it is 5 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 64,726 vehicles a day, roughly 6% of them trucks, projected to reach 112,368 by 2040. The structure is 138 ft (42.2 m) long and 75 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI124 Sbl
CrossesW. 9th St. (fau 3551)
Location3 MI S of Tn River
RouteInterstate 124
Coordinates35.0465, -85.31418
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating25.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length138 ft (42.2 m)
Longest span133 ft (40.6 m)
Deck width75 ft (22.8 m)
Roadway width73 ft (22.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,726 (2021)
Projected traffic112,368 by 2040
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I124 Sbl over W. 9th St. (fau 3551) built?

It was built in 2020, making it 5 years old in 2025.

What condition is I124 Sbl over W. 9th St. (fau 3551) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does I124 Sbl over W. 9th St. (fau 3551) carry?

About 64,726 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I124 Sbl over W. 9th St. (fau 3551)?

The structure is 138 ft (42.2 m) long with a longest span of 133 ft (40.6 m) and a deck 75 ft wide.

Who owns I124 Sbl over W. 9th St. (fau 3551)?

It is owned by the State Highway Agency.