US Bridges

I75 over E.Brainard RD (sr 320)

Fair

Hamilton County, Tennessee · I-75 / SR-320 · Structure no. 33I00750027

Built
1960
65 years old, rebuilt 1992
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
218 ft
4 main spans
Daily traffic
120,984
2021 count
Owner
State
State Highway Agency

About this bridge

I75 over E.Brainard RD (sr 320) is a prestressed concrete box beam or girders - multiple carrying I75 over E.Brainard RD (sr 320) in Hamilton County, Tennessee. It was built in 1960 and reconstructed in 1992, so it is 65 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 120,984 vehicles a day, roughly 7% of them trucks, projected to reach 177,952 by 2040. The structure is 218 ft (66.3 m) long and 152 ft wide.

Location

Open in Google Maps
CarriesI75
CrossesE.Brainard RD (sr 320)
LocationI-75 / SR-320
RouteInterstate 75
CountyHamilton County
StateTennessee
Coordinates35.01697, -85.17875
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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20 + Mod
Structure length218 ft (66.3 m)
Longest span70 ft (21.3 m)
Deck width152 ft (46.3 m)
Roadway width126 ft (38.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120,984 (2021)
Projected traffic177,952 by 2040
Trucks7%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I75 over E.Brainard RD (sr 320) built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1992.

What condition is I75 over E.Brainard RD (sr 320) 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 2024.

How much traffic does I75 over E.Brainard RD (sr 320) carry?

About 120,984 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I75 over E.Brainard RD (sr 320)?

The structure is 218 ft (66.3 m) long with a longest span of 70 ft (21.3 m) and a deck 152 ft wide.

Who owns I75 over E.Brainard RD (sr 320)?

It is owned by the State Highway Agency.