US Bridges

Nfa 925 (sa 4303) over Duck River

Fair

Humphreys County, Tennessee · 4 M. W. SR 13 · Structure no. 43S63730003

Built
1962
63 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
550 ft
7 main spans
Daily traffic
498
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 925 (sa 4303) over Duck River is a steel continuous stringer/multi-beam or girder carrying Nfa 925 (sa 4303) over Duck River in Humphreys County, Tennessee. It was built in 1962, so it is 63 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.

It carries about 498 vehicles a day, roughly 3% of them trucks, projected to reach 797 by 2042. The structure is 550 ft (167.6 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 925 (sa 4303)
CrossesDuck River
Location4 M. W. SR 13
RouteCounty Highway 925
CountyHumphreys County
StateTennessee
Coordinates35.99432, -87.83324
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating37.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length550 ft (167.6 m)
Longest span147 ft (44.8 m)
Deck width18 ft (5.6 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic498 (2021)
Projected traffic797 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.3 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Nfa 925 (sa 4303) over Duck River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Nfa 925 (sa 4303) over Duck River 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 October 2023.

How much traffic does Nfa 925 (sa 4303) over Duck River carry?

About 498 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 925 (sa 4303) over Duck River?

The structure is 550 ft (167.6 m) long with a longest span of 147 ft (44.8 m) and a deck 18 ft wide.

Who owns Nfa 925 (sa 4303) over Duck River?

It is owned by the County Highway Agency.