US Bridges

Nfa A129 over SR 158 & Nfa A140

Fair

Knox County, Tennessee · 1.1 M N of SR1 · Structure no. 47SR1580013

Built
1935
90 years old
Condition
Fair
inspected June 2024
Type
Arch - Deck
Concrete
Length
631 ft
5 main spans
Daily traffic
8,075
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A129 over SR 158 & Nfa A140 is a concrete arch - deck carrying Nfa A129 over SR 158 & Nfa A140 in Knox County, Tennessee. It was built in 1935, so it is 90 years old, older 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 8,075 vehicles a day, roughly 1% of them trucks, projected to reach 5,104 by 2040. The structure is 631 ft (192.3 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa A129
CrossesSR 158 & Nfa A140
Location1.1 M N of SR1
RouteCity Street 129
CountyKnox County
StateTennessee
Coordinates35.96175, -83.91447
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadUnknown
Structure length631 ft (192.3 m)
Longest span150 ft (45.7 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,075 (2021)
Projected traffic5,104 by 2040
Trucks1%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$6 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A129 over SR 158 & Nfa A140 built?

It was built in 1935, making it 90 years old in 2025.

What condition is Nfa A129 over SR 158 & Nfa A140 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 June 2024.

How much traffic does Nfa A129 over SR 158 & Nfa A140 carry?

About 8,075 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa A129 over SR 158 & Nfa A140?

The structure is 631 ft (192.3 m) long with a longest span of 150 ft (45.7 m) and a deck 39 ft wide.

Who owns Nfa A129 over SR 158 & Nfa A140?

It is owned by the City or Municipal Highway Agency.