US Bridges

Nfa 1761 350805K over Tennessee Southern RR

FairPosted for load

Lawrence County, Tennessee · 1.6 M. Sw. Iron City. · Structure no. 50017610001

Built
1942
83 years old
Condition
Fair
inspected May 2023
Type
Truss - Thru
Wood or Timber
Length
64 ft
1 main span
Daily traffic
56
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1761 350805K over Tennessee Southern RR is a wood or timber truss - thru carrying Nfa 1761 350805K over Tennessee Southern RR in Lawrence County, Tennessee. It was built in 1942, so it is 83 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 56 vehicles a day, roughly 2% of them trucks, projected to reach 96 by 2042. The structure is 64 ft (19.5 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa 1761 350805K
CrossesTennessee Southern RR
Location1.6 M. Sw. Iron City.
RouteCounty Highway 1761
CountyLawrence County
StateTennessee
Coordinates35.0044, -87.60712
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating30.8 US tons
Inventory rating22.8 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length64 ft (19.5 m)
Longest span43 ft (13.1 m)
Deck width19 ft (5.8 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2021)
Projected traffic96 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$217,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa 1761 350805K over Tennessee Southern RR built?

It was built in 1942, making it 83 years old in 2025.

What condition is Nfa 1761 350805K over Tennessee Southern RR 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 May 2023.

How much traffic does Nfa 1761 350805K over Tennessee Southern RR carry?

About 56 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Nfa 1761 350805K over Tennessee Southern RR?

The structure is 64 ft (19.5 m) long with a longest span of 43 ft (13.1 m) and a deck 19 ft wide.

Who owns Nfa 1761 350805K over Tennessee Southern RR?

It is owned by the County Highway Agency.