US Bridges

Nfa 925 (sa 4303) over Grassy Branch

Poor

Humphreys County, Tennessee · 4 M. W. SR13. · Structure no. 43S63730001

Built
1955
70 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
498
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 925 (sa 4303) over Grassy Branch is a steel stringer/multi-beam or girder carrying Nfa 925 (sa 4303) over Grassy Branch in Humphreys County, Tennessee. It was built in 1955, so it is 70 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 2 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: open, temporary structure in place while original is closed.

It carries about 498 vehicles a day, roughly 3% of them trucks, projected to reach 797 by 2042. The structure is 36 ft (11 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa 925 (sa 4303)
CrossesGrassy Branch
Location4 M. W. SR13.
RouteCounty Highway 925
Coordinates35.97647, -87.83832
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
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.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, temporary structure in place while original is closed
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic498 (2021)
Projected traffic797 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$167,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 925 (sa 4303) over Grassy Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is Nfa 925 (sa 4303) over Grassy Branch 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 October 2023.

How much traffic does Nfa 925 (sa 4303) over Grassy Branch carry?

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

How long is Nfa 925 (sa 4303) over Grassy Branch?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 22 ft wide.

Who owns Nfa 925 (sa 4303) over Grassy Branch?

It is owned by the County Highway Agency.