US Bridges

I181 Lf LN over CSX Railroad

Fair

Sullivan County, Tennessee · South of Holston R. · Structure no. 82I00260029

Built
1981
44 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
353 ft
5 main spans
Daily traffic
25,622
2021 count
Owner
State
State Highway Agency

About this bridge

I181 Lf LN over CSX Railroad is a prestressed concrete stringer/multi-beam or girder carrying I181 Lf LN over CSX Railroad in Sullivan County, Tennessee. It was built in 1981, so it is 44 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 5 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 25,622 vehicles a day, roughly 6% of them trucks, projected to reach 40,995 by 2042. The structure is 353 ft (107.5 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI181 Lf LN
CrossesCSX Railroad
LocationSouth of Holston R.
RouteInterstate 26
CountySullivan County
StateTennessee
Coordinates36.54312, -82.58248
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length353 ft (107.5 m)
Longest span75 ft (22.9 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,622 (2021)
Projected traffic40,995 by 2042
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I181 Lf LN over CSX Railroad built?

It was built in 1981, making it 44 years old in 2025.

What condition is I181 Lf LN over CSX Railroad 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 August 2024.

How much traffic does I181 Lf LN over CSX Railroad carry?

About 25,622 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I181 Lf LN over CSX Railroad?

The structure is 353 ft (107.5 m) long with a longest span of 75 ft (22.9 m) and a deck 50 ft wide.

Who owns I181 Lf LN over CSX Railroad?

It is owned by the State Highway Agency.