US Bridges

FAU 4831 over Callahan Rd.-Ll / I75

Fair

Knox County, Tennessee · Just N of City Limits · Structure no. 47I00750038

Built
1969
56 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete Continuous
Length
219 ft
4 main spans
Daily traffic
26,210
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 4831 over Callahan Rd.-Ll / I75 is a concrete continuous tee beam carrying FAU 4831 over Callahan Rd.-Ll / I75 in Knox County, Tennessee. It was built in 1969, so it is 56 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 26,210 vehicles a day, roughly 6% of them trucks, projected to reach 37,958 by 2041. The structure is 219 ft (66.6 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAU 4831
CrossesCallahan Rd.-Ll / I75
LocationJust N of City Limits
RouteCity Street 4831
CountyKnox County
StateTennessee
Coordinates36.02488, -83.99715
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length219 ft (66.6 m)
Longest span61 ft (18.7 m)
Deck width36 ft (11.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,210 (2021)
Projected traffic37,958 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.8 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 4831 over Callahan Rd.-Ll / I75 built?

It was built in 1969, making it 56 years old in 2025.

What condition is FAU 4831 over Callahan Rd.-Ll / I75 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 2025.

How much traffic does FAU 4831 over Callahan Rd.-Ll / I75 carry?

About 26,210 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAU 4831 over Callahan Rd.-Ll / I75?

The structure is 219 ft (66.6 m) long with a longest span of 61 ft (18.7 m) and a deck 36 ft wide.

Who owns FAU 4831 over Callahan Rd.-Ll / I75?

It is owned by the State Highway Agency.