US Bridges

I 840 over I 840-LL / SR 11

Good

Williamson County, Tennessee · 1.0 MI S JCT.SR11&SR96 · Structure no. 94SR8400084

Built
1999
26 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
217 ft
3 main spans
Daily traffic
39,020
2021 count
Owner
State
State Highway Agency

About this bridge

I 840 over I 840-LL / SR 11 is a prestressed concrete continuous stringer/multi-beam or girder carrying I 840 over I 840-LL / SR 11 in Williamson County, Tennessee. It was built in 1999, so it is 26 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 39,020 vehicles a day, roughly 7% of them trucks, projected to reach 57,094 by 2041. The structure is 217 ft (66 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesI 840
CrossesI 840-LL / SR 11
Location1.0 MI S JCT.SR11&SR96
RouteInterstate 840
CountyWilliamson County
StateTennessee
Coordinates35.84617, -86.66125
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
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 rating82.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length217 ft (66 m)
Longest span128 ft (39 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,020 (2021)
Projected traffic57,094 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 I 840 over I 840-LL / SR 11 built?

It was built in 1999, making it 26 years old in 2025.

What condition is I 840 over I 840-LL / SR 11 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 February 2025.

How much traffic does I 840 over I 840-LL / SR 11 carry?

About 39,020 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I 840 over I 840-LL / SR 11?

The structure is 217 ft (66 m) long with a longest span of 128 ft (39 m) and a deck 44 ft wide.

Who owns I 840 over I 840-LL / SR 11?

It is owned by the State Highway Agency.