US Bridges

SR 73 over Tennessee River

Good

Loudon County, Tennessee · 4.8 MI South of I-75 · Structure no. 53SR0730021

Built
2017
8 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,400 ft
4 main spans
Daily traffic
13,140
2021 count
Owner
State
State Highway Agency

About this bridge

SR 73 over Tennessee River is a steel continuous stringer/multi-beam or girder carrying SR 73 over Tennessee River in Loudon County, Tennessee. It was built in 2017, so it is 8 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,140 vehicles a day, roughly 10% of them trucks, projected to reach 21,024 by 2042. The structure is 1,400 ft (426.7 m) long and 86 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 73
CrossesTennessee River
Location4.8 MI South of I-75
RouteState Highway 73
CountyLoudon County
StateTennessee
Coordinates35.78987, -84.2502
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length1,400 ft (426.7 m)
Longest span500 ft (152.4 m)
Deck width86 ft (26.2 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,140 (2021)
Projected traffic21,024 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 73 over Tennessee River built?

It was built in 2017, making it 8 years old in 2025.

What condition is SR 73 over Tennessee River 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 March 2023.

How much traffic does SR 73 over Tennessee River carry?

About 13,140 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is SR 73 over Tennessee River?

The structure is 1,400 ft (426.7 m) long with a longest span of 500 ft (152.4 m) and a deck 86 ft wide.

Who owns SR 73 over Tennessee River?

It is owned by the State Highway Agency.