US Bridges

I26 Lt LN over Nfa A370 (marbleton Rd)

Fair

Unicoi County, Tennessee · .5 M S of Carter CO Line · Structure no. 86I00260002

Built
1985
40 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
137 ft
3 main spans
Daily traffic
15,784
2021 count
Owner
State
State Highway Agency

About this bridge

I26 Lt LN over Nfa A370 (marbleton Rd) is a prestressed concrete box beam or girders - single or spread carrying I26 Lt LN over Nfa A370 (marbleton Rd) in Unicoi County, Tennessee. It was built in 1985, so it is 40 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 15,784 vehicles a day, roughly 6% of them trucks, projected to reach 26,696 by 2041. The structure is 137 ft (41.9 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI26 Lt LN
CrossesNfa A370 (marbleton Rd)
Location.5 M S of Carter CO Line
RouteInterstate 26
CountyUnicoi County
StateTennessee
Coordinates36.25241, -82.32431
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20 + Mod
Structure length137 ft (41.9 m)
Longest span55 ft (16.7 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,784 (2021)
Projected traffic26,696 by 2041
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 Lt LN over Nfa A370 (marbleton Rd) built?

It was built in 1985, making it 40 years old in 2025.

What condition is I26 Lt LN over Nfa A370 (marbleton Rd) 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 November 2024.

How much traffic does I26 Lt LN over Nfa A370 (marbleton Rd) carry?

About 15,784 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I26 Lt LN over Nfa A370 (marbleton Rd)?

The structure is 137 ft (41.9 m) long with a longest span of 55 ft (16.7 m) and a deck 44 ft wide.

Who owns I26 Lt LN over Nfa A370 (marbleton Rd)?

It is owned by the State Highway Agency.