US Bridges

FAU 45 over Cumberland River

Poor

Davidson County, Tennessee · 2 M E JCT SR6&SR45 · Structure no. 19SR0450002

Built
1928
97 years old, rebuilt 1969
Condition
Poor
inspected March 2023
Type
Truss - Thru
Steel
Length
1,222 ft
3 main spans
Daily traffic
32,950
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 45 over Cumberland River is a steel truss - thru carrying FAU 45 over Cumberland River in Davidson County, Tennessee. It was built in 1928 and reconstructed in 1969, so it is 97 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 32,950 vehicles a day, roughly 9% of them trucks, projected to reach 65,773 by 2041. The structure is 1,222 ft (372.5 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAU 45
CrossesCumberland River
Location2 M E JCT SR6&SR45
RouteState Highway 45
Coordinates36.26282, -86.6764
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20
Structure length1,222 ft (372.5 m)
Longest span323 ft (98.5 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deck18 ft (5.3 m)

Traffic and service

Average daily traffic32,950 (2021)
Projected traffic65,773 by 2041
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$20.8 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 45 over Cumberland River built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1969.

What condition is FAU 45 over Cumberland River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does FAU 45 over Cumberland River carry?

About 32,950 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAU 45 over Cumberland River?

The structure is 1,222 ft (372.5 m) long with a longest span of 323 ft (98.5 m) and a deck 38 ft wide.

Who owns FAU 45 over Cumberland River?

It is owned by the State Highway Agency.