US Bridges

Nfa A405 over Elk River

PoorClosed to traffic

Lincoln County, Tennessee · Lincoln County · Structure no. 52056810001

Built
1901
124 years old
Condition
Poor
inspected September 2023
Type
Truss - Thru
Steel
Length
330 ft
3 main spans
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A405 over Elk River is a steel truss - thru carrying Nfa A405 over Elk River in Lincoln County, Tennessee. It was built in 1901, so it is 124 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 100 vehicles a day, roughly 9% of them trucks, projected to reach 160 by 2041. The structure is 330 ft (100.6 m) long and 14 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesNfa A405
CrossesElk River
LocationLincoln County
RouteCounty Highway 405
CountyLincoln County
StateTennessee
Coordinates35.1368, -86.588
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans3 (+2 approach)
Design loadUnknown
Structure length330 ft (100.6 m)
Longest span200 ft (61 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deck14 ft (4.1 m)

Traffic and service

Average daily traffic100 (2020)
Projected traffic160 by 2041
Trucks9%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.9 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A405 over Elk River built?

It was built in 1901, making it 124 years old in 2025.

What condition is Nfa A405 over Elk River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Nfa A405 over Elk River carry?

About 100 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is Nfa A405 over Elk River?

The structure is 330 ft (100.6 m) long with a longest span of 200 ft (61 m) and a deck 14 ft wide.

Who owns Nfa A405 over Elk River?

It is owned by the County Highway Agency.