US Bridges

I26 Rt LN over Clinchfield Rr&fau 3987

Good

Washington County, Tennessee · In Johnson City · Structure no. 90I00260053

Built
1977
48 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
345 ft
3 main spans
Daily traffic
43,857
2021 count
Owner
State
State Highway Agency

About this bridge

I26 Rt LN over Clinchfield Rr&fau 3987 is a steel continuous stringer/multi-beam or girder carrying I26 Rt LN over Clinchfield Rr&fau 3987 in Washington County, Tennessee. It was built in 1977, so it is 48 years old, older 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 43,857 vehicles a day, roughly 6% of them trucks, projected to reach 55,594 by 2042. The structure is 345 ft (105.2 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI26 Rt LN
CrossesClinchfield Rr&fau 3987
LocationIn Johnson City
RouteInterstate 26
Coordinates36.31737, -82.3477
Functional classUrban 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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating29.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length345 ft (105.2 m)
Longest span138 ft (42.1 m)
Deck width53 ft (16.3 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,857 (2021)
Projected traffic55,594 by 2042
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 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 I26 Rt LN over Clinchfield Rr&fau 3987 built?

It was built in 1977, making it 48 years old in 2025.

What condition is I26 Rt LN over Clinchfield Rr&fau 3987 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 September 2023.

How much traffic does I26 Rt LN over Clinchfield Rr&fau 3987 carry?

About 43,857 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I26 Rt LN over Clinchfield Rr&fau 3987?

The structure is 345 ft (105.2 m) long with a longest span of 138 ft (42.1 m) and a deck 53 ft wide.

Who owns I26 Rt LN over Clinchfield Rr&fau 3987?

It is owned by the State Highway Agency.