US Bridges

Nfa A636 over Branch

Fair

Weakley County, Tennessee · 0.7 MI S of Martin · Structure no. 920A6360003

Built
1997
28 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
960
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A636 over Branch is a concrete continuous culvert carrying Nfa A636 over Branch in Weakley County, Tennessee. It was built in 1997, so it is 28 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 960 vehicles a day, roughly 2% of them trucks, projected to reach 1,536 by 2040. The structure is 27 ft (8.2 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A636
CrossesBranch
Location0.7 MI S of Martin
RouteCounty Highway 636
CountyWeakley County
StateTennessee
Coordinates36.31733, -88.86244
Functional classUrban Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic960 (2020)
Projected traffic1,536 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$61,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A636 over Branch built?

It was built in 1997, making it 28 years old in 2025.

What condition is Nfa A636 over Branch 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 A636 over Branch carry?

About 960 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A636 over Branch?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 29 ft wide.

Who owns Nfa A636 over Branch?

It is owned by the City or Municipal Highway Agency.