US Bridges

I840 over I-840-R / Old Nash. HWY

Good

Dickson County, Tennessee · I840 @ Old Nash.Hwy · Structure no. 22SR8400007

Built
2004
21 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
224 ft
3 main spans
Daily traffic
14,082
2021 count
Owner
State
State Highway Agency

About this bridge

I840 over I-840-R / Old Nash. HWY is a prestressed concrete continuous stringer/multi-beam or girder carrying I840 over I-840-R / Old Nash. HWY in Dickson County, Tennessee. It was built in 2004, so it is 21 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 14,082 vehicles a day, roughly 7% of them trucks, projected to reach 22,531 by 2042. The structure is 224 ft (68.2 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesI840
CrossesI-840-R / Old Nash. HWY
LocationI840 @ Old Nash.Hwy
RouteInterstate 840
Coordinates35.98592, -87.2407
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 inspectionMay 2024
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 rating63.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length224 ft (68.2 m)
Longest span79 ft (24.1 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,082 (2021)
Projected traffic22,531 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I840 over I-840-R / Old Nash. HWY built?

It was built in 2004, making it 21 years old in 2025.

What condition is I840 over I-840-R / Old Nash. HWY 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 2024.

How much traffic does I840 over I-840-R / Old Nash. HWY carry?

About 14,082 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I840 over I-840-R / Old Nash. HWY?

The structure is 224 ft (68.2 m) long with a longest span of 79 ft (24.1 m) and a deck 44 ft wide.

Who owns I840 over I-840-R / Old Nash. HWY?

It is owned by the State Highway Agency.