US Bridges

Nfa 1236 (sa 3026) over I81 Rt & Lf Lns

Fair

Greene County, Tennessee · Just N of SR172-I81 Exch · Structure no. 30I00810049

Built
1972
53 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
472 ft
5 main spans
Daily traffic
850
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa 1236 (sa 3026) over I81 Rt & Lf Lns is a concrete continuous box beam or girders - multiple carrying Nfa 1236 (sa 3026) over I81 Rt & Lf Lns in Greene County, Tennessee. It was built in 1972, so it is 53 years old, older 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 850 vehicles a day, roughly 3% of them trucks, projected to reach 1,504 by 2041. The structure is 472 ft (143.9 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNfa 1236 (sa 3026)
CrossesI81 Rt & Lf Lns
LocationJust N of SR172-I81 Exch
RouteCounty Highway 1236
Coordinates36.32697, -82.82825
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating35.4 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length472 ft (143.9 m)
Longest span125 ft (38.1 m)
Deck width36 ft (11 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2021)
Projected traffic1,504 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa 1236 (sa 3026) over I81 Rt & Lf Lns built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nfa 1236 (sa 3026) over I81 Rt & Lf Lns 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 July 2024.

How much traffic does Nfa 1236 (sa 3026) over I81 Rt & Lf Lns carry?

About 850 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1236 (sa 3026) over I81 Rt & Lf Lns?

The structure is 472 ft (143.9 m) long with a longest span of 125 ft (38.1 m) and a deck 36 ft wide.

Who owns Nfa 1236 (sa 3026) over I81 Rt & Lf Lns?

It is owned by the State Highway Agency.