US Bridges

I24 over Black CR & Cummings RD

Fair

Hamilton County, Tennessee · 2.3 MI E of Ga State Line · Structure no. 33I00240002

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
152 ft
4 main spans
Daily traffic
67,119
2021 count
Owner
State
State Highway Agency

About this bridge

I24 over Black CR & Cummings RD is a concrete tee beam carrying I24 over Black CR & Cummings RD in Hamilton County, Tennessee. It was built in 1964, so it is 61 years old, older than the Tennessee average of 47.4 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 67,119 vehicles a day, roughly 6% of them trucks, projected to reach 98,288 by 2040. The structure is 152 ft (46.3 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI24
CrossesBlack CR & Cummings RD
Location2.3 MI E of Ga State Line
RouteInterstate 24
Coordinates35.01148, -85.38958
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span44 ft (13.4 m)
Deck width45 ft (13.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,119 (2021)
Projected traffic98,288 by 2040
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I24 over Black CR & Cummings RD built?

It was built in 1964, making it 61 years old in 2025.

What condition is I24 over Black CR & Cummings RD 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 August 2024.

How much traffic does I24 over Black CR & Cummings RD carry?

About 67,119 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I24 over Black CR & Cummings RD?

The structure is 152 ft (46.3 m) long with a longest span of 44 ft (13.4 m) and a deck 45 ft wide.

Who owns I24 over Black CR & Cummings RD?

It is owned by the State Highway Agency.