US Bridges

Nfa D672 over Backwater of Tn. River

Fair

Hamilton County, Tennessee · 2 MI North of I-24 · Structure no. 330D6720001

Built
1983
42 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
150
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa D672 over Backwater of Tn. River is a steel stringer/multi-beam or girder carrying Nfa D672 over Backwater of Tn. River in Hamilton County, Tennessee. It was built in 1983, so it is 42 years old, younger 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 150 vehicles a day, roughly 3% of them trucks, projected to reach 240 by 2040. The structure is 51 ft (15.4 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa D672
CrossesBackwater of Tn. River
Location2 MI North of I-24
RouteCity Street 672
CountyHamilton County
StateTennessee
Coordinates35.04388, -85.35065
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length51 ft (15.4 m)
Longest span50 ft (15.1 m)
Deck width36 ft (10.9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic240 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$782,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa D672 over Backwater of Tn. River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Nfa D672 over Backwater of Tn. River 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 March 2024.

How much traffic does Nfa D672 over Backwater of Tn. River carry?

About 150 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Nfa D672 over Backwater of Tn. River?

The structure is 51 ft (15.4 m) long with a longest span of 50 ft (15.1 m) and a deck 36 ft wide.

Who owns Nfa D672 over Backwater of Tn. River?

It is owned by the City or Municipal Highway Agency.