US Bridges

Nfa 1560 over Overflow

Fair

Weakley County, Tennessee · 1.7 MI N of SR22 · Structure no. 920A2720009

Built
1993
32 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
198
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1560 over Overflow is a concrete continuous culvert carrying Nfa 1560 over Overflow in Weakley County, Tennessee. It was built in 1993, so it is 32 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 198 vehicles a day, roughly 3% of them trucks, projected to reach 240 by 2041. The structure is 56 ft (17.2 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesNfa 1560
CrossesOverflow
Location1.7 MI N of SR22
RouteCounty Highway 1560
Coordinates36.25786, -88.60797
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span15 ft (4.6 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic198 (2021)
Projected traffic240 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1560 over Overflow built?

It was built in 1993, making it 32 years old in 2025.

What condition is Nfa 1560 over Overflow 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 1560 over Overflow carry?

About 198 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1560 over Overflow?

The structure is 56 ft (17.2 m) long with a longest span of 15 ft (4.6 m) and a deck 30 ft wide.

Who owns Nfa 1560 over Overflow?

It is owned by the County Highway Agency.