US Bridges

FAU 320 350030G over CSX Railroad

Fair

Hamilton County, Tennessee · 0.8 Mi. W of I-75 Jct. · Structure no. 33S43070001

Built
1936
89 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
117 ft
3 main spans
Daily traffic
14,517
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 320 350030G over CSX Railroad is a concrete tee beam carrying FAU 320 350030G over CSX Railroad in Hamilton County, Tennessee. It was built in 1936, so it is 89 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 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 14,517 vehicles a day, roughly 7% of them trucks, projected to reach 19,874 by 2041. The structure is 117 ft (35.7 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFAU 320 350030G
CrossesCSX Railroad
Location0.8 Mi. W of I-75 Jct.
RouteState Highway 320
CountyHamilton County
StateTennessee
Coordinates35.01838, -85.19227
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating33.6 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length117 ft (35.7 m)
Longest span39 ft (11.9 m)
Deck width36 ft (11.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,517 (2021)
Projected traffic19,874 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.2 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 320 350030G over CSX Railroad built?

It was built in 1936, making it 89 years old in 2025.

What condition is FAU 320 350030G over CSX Railroad 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 December 2024.

How much traffic does FAU 320 350030G over CSX Railroad carry?

About 14,517 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is FAU 320 350030G over CSX Railroad?

The structure is 117 ft (35.7 m) long with a longest span of 39 ft (11.9 m) and a deck 36 ft wide.

Who owns FAU 320 350030G over CSX Railroad?

It is owned by the State Highway Agency.