US Bridges

Nfa 815 (sa 9220) over North Fork Obion River

Fair

Weakley County, Tennessee · 4 MI E of Obion CO Line · Structure no. 92S80110007

Built
1956
69 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
452 ft
1 main span
Daily traffic
272
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 815 (sa 9220) over North Fork Obion River is a concrete tee beam carrying Nfa 815 (sa 9220) over North Fork Obion River in Weakley County, Tennessee. It was built in 1956, so it is 69 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 272 vehicles a day, roughly 3% of them trucks, projected to reach 435 by 2042. The structure is 452 ft (137.8 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 815 (sa 9220)
CrossesNorth Fork Obion River
Location4 MI E of Obion CO Line
RouteCounty Highway 815
CountyWeakley County
StateTennessee
Coordinates36.40609, -88.79042
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; extensive scour has occurred
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+14 approach)
Design loadH 15
Structure length452 ft (137.8 m)
Longest span53 ft (16.2 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic272 (2021)
Projected traffic435 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 815 (sa 9220) over North Fork Obion River built?

It was built in 1956, making it 69 years old in 2025.

What condition is Nfa 815 (sa 9220) over North Fork Obion River 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 September 2024.

How much traffic does Nfa 815 (sa 9220) over North Fork Obion River carry?

About 272 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 815 (sa 9220) over North Fork Obion River?

The structure is 452 ft (137.8 m) long with a longest span of 53 ft (16.2 m) and a deck 29 ft wide.

Who owns Nfa 815 (sa 9220) over North Fork Obion River?

It is owned by the County Highway Agency.