US Bridges

FAU 3121 348175T over CSX Railroad

Fair

Montgomery County, Tennessee · In Clarksville · Structure no. 63SR0130013

Built
2000
25 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
270 ft
3 main spans
Daily traffic
4,808
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 3121 348175T over CSX Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying FAU 3121 348175T over CSX Railroad in Montgomery County, Tennessee. It was built in 2000, so it is 25 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 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 4,808 vehicles a day, roughly 4% of them trucks, projected to reach 9,632 by 2041. The structure is 270 ft (82.3 m) long and 60 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

Location

Open in Google Maps
CarriesFAU 3121 348175T
CrossesCSX Railroad
LocationIn Clarksville
RouteCity Street 3121
CountyMontgomery County
StateTennessee
Coordinates36.5243, -87.35223
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length270 ft (82.3 m)
Longest span120 ft (36.6 m)
Deck width60 ft (18.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,808 (2021)
Projected traffic9,632 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed80.2 mi (129 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.3 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 3121 348175T over CSX Railroad built?

It was built in 2000, making it 25 years old in 2025.

What condition is FAU 3121 348175T 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 October 2024.

How much traffic does FAU 3121 348175T over CSX Railroad carry?

About 4,808 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 3121 348175T over CSX Railroad?

The structure is 270 ft (82.3 m) long with a longest span of 120 ft (36.6 m) and a deck 60 ft wide.

Who owns FAU 3121 348175T over CSX Railroad?

It is owned by the City or Municipal Highway Agency.