US Bridges

I840 over Overflow

Fair

Rutherford County, Tennessee · I840 · Structure no. 75SR8400059

Built
1997
28 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
40,188
2021 count
Owner
State
State Highway Agency

About this bridge

I840 over Overflow is a concrete continuous culvert carrying I840 over Overflow in Rutherford County, Tennessee. It was built in 1997, so it is 28 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 40,188 vehicles a day, roughly 7% of them trucks, projected to reach 57,504 by 2041. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesI840
CrossesOverflow
LocationI840
RouteInterstate I0840
CountyRutherford County
StateTennessee
Coordinates35.91599, -86.43916
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.9 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,188 (2021)
Projected traffic57,504 by 2041
Trucks7%
Lanes on structure4
Traffic directionTwo-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$502,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I840 over Overflow built?

It was built in 1997, making it 28 years old in 2025.

What condition is I840 over Overflow 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 I840 over Overflow carry?

About 40,188 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I840 over Overflow?

The structure is 32 ft (9.9 m) long with a longest span of 10 ft (3.1 m).

Who owns I840 over Overflow?

It is owned by the State Highway Agency.