US Bridges

Nfa A430 over Knight Creek

Good

Wilson County, Tennessee · 4.3 MI NW JCT SR96&SR267 · Structure no. 950A4300001

Built
1985
40 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A430 over Knight Creek is a concrete continuous culvert carrying Nfa A430 over Knight Creek in Wilson County, Tennessee. It was built in 1985, so it is 40 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 30 vehicles a day, roughly 1% of them trucks, projected to reach 48 by 2041. The structure is 32 ft (9.8 m) long and 12 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A430
CrossesKnight Creek
Location4.3 MI NW JCT SR96&SR267
RouteCounty Highway 0A430
CountyWilson County
StateTennessee
Coordinates35.99738, -86.14397
Functional classRural 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 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum 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 length32 ft (9.8 m)
Longest span15 ft (4.6 m)
Deck width12 ft (3.8 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2041
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$172,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A430 over Knight Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Nfa A430 over Knight Creek 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 A430 over Knight Creek carry?

About 30 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa A430 over Knight Creek?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 12 ft wide.

Who owns Nfa A430 over Knight Creek?

It is owned by the County Highway Agency.