US Bridges

Nfa A129 over Knob Creek

Good

Bedford County, Tennessee · 3 M. E. Wartrace. · Structure no. 020A1290003

Built
2003
22 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
850
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A129 over Knob Creek is a concrete continuous culvert carrying Nfa A129 over Knob Creek in Bedford County, Tennessee. It was built in 2003, so it is 22 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 850 vehicles a day, roughly 2% of them trucks, projected to reach 1,360 by 2041. The structure is 38 ft (11.6 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A129
CrossesKnob Creek
Location3 M. E. Wartrace.
RouteCounty Highway 129
CountyBedford County
StateTennessee
Coordinates35.51728, -86.28591
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span14 ft (4.3 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2020)
Projected traffic1,360 by 2041
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 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 A129 over Knob Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Nfa A129 over Knob 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 January 2025.

How much traffic does Nfa A129 over Knob Creek carry?

About 850 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A129 over Knob Creek?

The structure is 38 ft (11.6 m) long with a longest span of 14 ft (4.3 m) and a deck 44 ft wide.

Who owns Nfa A129 over Knob Creek?

It is owned by the County Highway Agency.