US Bridges

Nfa 1846 (sa 4125) over Duck River

Poor

Hickman County, Tennessee · 7 M East of Centerville · Structure no. 41018460003

Built
1968
57 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
373 ft
4 main spans
Daily traffic
216
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1846 (sa 4125) over Duck River is a steel continuous stringer/multi-beam or girder carrying Nfa 1846 (sa 4125) over Duck River in Hickman County, Tennessee. It was built in 1968, so it is 57 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 4 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.

It carries about 216 vehicles a day, roughly 3% of them trucks, projected to reach 346 by 2042. The structure is 373 ft (113.7 m) long and 26 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesNfa 1846 (sa 4125)
CrossesDuck River
Location7 M East of Centerville
RouteCounty Highway 1846
CountyHickman County
StateTennessee
Coordinates35.79783, -87.3442
Functional classRural Minor Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: 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 rating50.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+3 approach)
Design loadHS 20
Structure length373 ft (113.7 m)
Longest span85 ft (25.9 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216 (2021)
Projected traffic346 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1846 (sa 4125) over Duck River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Nfa 1846 (sa 4125) over Duck 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 1846 (sa 4125) over Duck River carry?

About 216 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1846 (sa 4125) over Duck River?

The structure is 373 ft (113.7 m) long with a longest span of 85 ft (25.9 m) and a deck 26 ft wide.

Who owns Nfa 1846 (sa 4125) over Duck River?

It is owned by the County Highway Agency.