US Bridges

I840 over I840-RL /Carters Cr. RD

Good

Williamson County, Tennessee · 8 MI W Jct. I65&I840 · Structure no. 94SR8400037

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
267 ft
3 main spans
Daily traffic
22,556
2021 count
Owner
State
State Highway Agency

About this bridge

I840 over I840-RL /Carters Cr. RD is a prestressed concrete continuous stringer/multi-beam or girder carrying I840 over I840-RL /Carters Cr. RD in Williamson County, Tennessee. It was built in 2011, so it is 14 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,556 vehicles a day, roughly 7% of them trucks, projected to reach 30,736 by 2041. The structure is 267 ft (81.4 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesI840
CrossesI840-RL /Carters Cr. RD
Location8 MI W Jct. I65&I840
RouteInterstate 840
Coordinates35.81542, -86.98251
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length267 ft (81.4 m)
Longest span104 ft (31.7 m)
Deck width43 ft (13.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,556 (2021)
Projected traffic30,736 by 2041
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I840 over I840-RL /Carters Cr. RD built?

It was built in 2011, making it 14 years old in 2025.

What condition is I840 over I840-RL /Carters Cr. RD in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does I840 over I840-RL /Carters Cr. RD carry?

About 22,556 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I840 over I840-RL /Carters Cr. RD?

The structure is 267 ft (81.4 m) long with a longest span of 104 ft (31.7 m) and a deck 43 ft wide.

Who owns I840 over I840-RL /Carters Cr. RD?

It is owned by the State Highway Agency.