US Bridges

Nfa 1105 (sa 1606) over I24

Fair

Coffee County, Tennessee · 3 MI S of Hillsboro · Structure no. 16I00240051

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
322 ft
5 main spans
Daily traffic
446
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa 1105 (sa 1606) over I24 is a concrete continuous tee beam carrying Nfa 1105 (sa 1606) over I24 in Coffee County, Tennessee. It was built in 1963, so it is 62 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 446 vehicles a day, roughly 3% of them trucks, projected to reach 960 by 2039. The structure is 322 ft (98 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNfa 1105 (sa 1606)
CrossesI24
Location3 MI S of Hillsboro
RouteCounty Highway 1105
CountyCoffee County
StateTennessee
Coordinates35.3643, -85.96218
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 alignment6: Equal to present minimum criteria
Operating rating36.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length322 ft (98 m)
Longest span71 ft (21.6 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic446 (2021)
Projected traffic960 by 2039
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.7 million (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa 1105 (sa 1606) over I24 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Nfa 1105 (sa 1606) over I24 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 2023.

How much traffic does Nfa 1105 (sa 1606) over I24 carry?

About 446 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1105 (sa 1606) over I24?

The structure is 322 ft (98 m) long with a longest span of 71 ft (21.6 m) and a deck 29 ft wide.

Who owns Nfa 1105 (sa 1606) over I24?

It is owned by the State Highway Agency.