US Bridges

Nfa A743 over Harper Road / I24

Good

Davidson County, Tennessee · Harper RD near SR112. · Structure no. 19I00240051

Built
1972
53 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
360 ft
4 main spans
Daily traffic
210
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa A743 over Harper Road / I24 is a concrete continuous box beam or girders - multiple carrying Nfa A743 over Harper Road / I24 in Davidson County, Tennessee. It was built in 1972, so it is 53 years old, older 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 210 vehicles a day, roughly 2% of them trucks, projected to reach 336 by 2041. The structure is 360 ft (109.7 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNfa A743
CrossesHarper Road / I24
LocationHarper RD near SR112.
RouteCounty Highway 743
Coordinates36.33726, -86.91375
Functional classRural Local

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length360 ft (109.7 m)
Longest span119 ft (36.3 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2020)
Projected traffic336 by 2041
Trucks2%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A743 over Harper Road / I24 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nfa A743 over Harper Road / I24 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 September 2023.

How much traffic does Nfa A743 over Harper Road / I24 carry?

About 210 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A743 over Harper Road / I24?

The structure is 360 ft (109.7 m) long with a longest span of 119 ft (36.3 m) and a deck 36 ft wide.

Who owns Nfa A743 over Harper Road / I24?

It is owned by the State Highway Agency.