US Bridges

Nfa B430 over A Lake

Good

Davidson County, Tennessee · .1 M E Century Blvd · Structure no. 190B4300001

Built
1980
45 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
34,160
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa B430 over A Lake is a concrete continuous culvert carrying Nfa B430 over A Lake in Davidson County, Tennessee. It was built in 1980, so it is 45 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 34,160 vehicles a day, roughly 2% of them trucks, projected to reach 54,656 by 2041. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNfa B430
CrossesA Lake
Location.1 M E Century Blvd
RouteCity Street 430
Coordinates36.14748, -86.6813
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating66.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,160 (2020)
Projected traffic54,656 by 2041
Trucks2%
Lanes on structure3
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$301,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B430 over A Lake built?

It was built in 1980, making it 45 years old in 2025.

What condition is Nfa B430 over A Lake 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 August 2023.

How much traffic does Nfa B430 over A Lake carry?

About 34,160 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa B430 over A Lake?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns Nfa B430 over A Lake?

It is owned by the City or Municipal Highway Agency.