US Bridges

Nfa A499 over Martha Branch

Good

Wilson County, Tennessee · 1.2 MI SE JCT SR24&SR109 · Structure no. 950A4990001

Built
1992
33 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
670
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A499 over Martha Branch is a concrete continuous culvert carrying Nfa A499 over Martha Branch in Wilson County, Tennessee. It was built in 1992, so it is 33 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 670 vehicles a day, roughly 2% of them trucks, projected to reach 1,072 by 2038. The structure is 23 ft (7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa A499
CrossesMartha Branch
Location1.2 MI SE JCT SR24&SR109
RouteCity Street 0A499
Coordinates36.21887, -86.4143
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2020)
Projected traffic1,072 by 2038
Trucks2%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A499 over Martha Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nfa A499 over Martha Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Nfa A499 over Martha Branch carry?

About 670 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A499 over Martha Branch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns Nfa A499 over Martha Branch?

It is owned by the County Highway Agency.