US Bridges

I 840 over Wilson Branch

Good

Williamson County, Tennessee · 1.5 MI W JCT SR11 & I840 · Structure no. 94SR8400081

Built
2001
24 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
260 ft
4 main spans
Daily traffic
39,020
2021 count
Owner
State
State Highway Agency

About this bridge

I 840 over Wilson Branch is a prestressed concrete continuous stringer/multi-beam or girder carrying I 840 over Wilson Branch in Williamson County, Tennessee. It was built in 2001, so it is 24 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 260 ft (79.2 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
CrossesWilson Branch
Location1.5 MI W JCT SR11 & I840
RouteInterstate 840
CountyWilliamson County
StateTennessee
Coordinates35.84715, -86.68833
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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span66 ft (20 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
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 840 over Wilson Branch built?

It was built in 2001, making it 24 years old in 2025.

What condition is I 840 over Wilson Branch 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 March 2023.

How much traffic does I 840 over Wilson Branch carry?

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

How long is I 840 over Wilson Branch?

The structure is 260 ft (79.2 m) long with a longest span of 66 ft (20 m) and a deck 44 ft wide.

Who owns I 840 over Wilson Branch?

It is owned by the State Highway Agency.