US Bridges

I75 over Hiwassee River

Fair

Bradley County, Tennessee · Bradley-Mcminn Co.Line · Structure no. 06I00750028

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
1,100 ft
6 main spans
Daily traffic
48,545
2021 count
Owner
State
State Highway Agency

About this bridge

I75 over Hiwassee River is a steel continuous girder and floorbeam system carrying I75 over Hiwassee River in Bradley County, Tennessee. It was built in 1968, so it is 57 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 6 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 48,545 vehicles a day, roughly 6% of them trucks, projected to reach 70,970 by 2042. The structure is 1,100 ft (335.4 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI75
CrossesHiwassee River
LocationBradley-Mcminn Co.Line
RouteInterstate 75
CountyBradley County
StateTennessee
Coordinates35.31505, -84.80105
Functional classUrban Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating26.8 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckSteel plate
Main spans6
Design loadHS 20 + Mod
Structure length1,100 ft (335.4 m)
Longest span292 ft (89 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,545 (2021)
Projected traffic70,970 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I75 over Hiwassee River built?

It was built in 1968, making it 57 years old in 2025.

What condition is I75 over Hiwassee 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 July 2023.

How much traffic does I75 over Hiwassee River carry?

About 48,545 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I75 over Hiwassee River?

The structure is 1,100 ft (335.4 m) long with a longest span of 292 ft (89 m) and a deck 42 ft wide.

Who owns I75 over Hiwassee River?

It is owned by the State Highway Agency.