US Bridges

Nfa B242 (sa 4528) over I81

Fair

Jefferson County, Tennessee · 7.1 MI NE JCT I40&I81 · Structure no. 45I00810017

Built
1966
59 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
254 ft
4 main spans
Daily traffic
990
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa B242 (sa 4528) over I81 is a concrete continuous tee beam carrying Nfa B242 (sa 4528) over I81 in Jefferson County, Tennessee. It was built in 1966, so it is 59 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 990 vehicles a day, roughly 21% of them trucks, projected to reach 1,584 by 2042. The structure is 254 ft (77.5 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa B242 (sa 4528)
CrossesI81
Location7.1 MI NE JCT I40&I81
RouteCounty Highway 242
CountyJefferson County
StateTennessee
Coordinates36.13385, -83.29425
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length254 ft (77.5 m)
Longest span73 ft (22.1 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2020)
Projected traffic1,584 by 2042
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$386,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa B242 (sa 4528) over I81 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Nfa B242 (sa 4528) over I81 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 June 2024.

How much traffic does Nfa B242 (sa 4528) over I81 carry?

About 990 vehicles per day (2020 count), of which roughly 21% are trucks.

How long is Nfa B242 (sa 4528) over I81?

The structure is 254 ft (77.5 m) long with a longest span of 73 ft (22.1 m) and a deck 29 ft wide.

Who owns Nfa B242 (sa 4528) over I81?

It is owned by the State Highway Agency.