US Bridges

Nfa 997 (sa 6004) over Bigby Creek

Fair

Maury County, Tennessee · 10.5 M. Sw. Columbia. · Structure no. 60009970003

Built
1997
28 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
164 ft
3 main spans
Daily traffic
437
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 997 (sa 6004) over Bigby Creek is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa 997 (sa 6004) over Bigby Creek in Maury County, Tennessee. It was built in 1997, so it is 28 years old, younger 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 437 vehicles a day, roughly 3% of them trucks, projected to reach 752 by 2040. The structure is 164 ft (50 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa 997 (sa 6004)
CrossesBigby Creek
Location10.5 M. Sw. Columbia.
RouteCounty Highway 997
CountyMaury County
StateTennessee
Coordinates35.57067, -87.21275
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length164 ft (50 m)
Longest span62 ft (18.9 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic437 (2021)
Projected traffic752 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 of existing bridge without deck rehabilitation
Estimated improvement cost$421,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 997 (sa 6004) over Bigby Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Nfa 997 (sa 6004) over Bigby Creek 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 June 2024.

How much traffic does Nfa 997 (sa 6004) over Bigby Creek carry?

About 437 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 997 (sa 6004) over Bigby Creek?

The structure is 164 ft (50 m) long with a longest span of 62 ft (18.9 m) and a deck 26 ft wide.

Who owns Nfa 997 (sa 6004) over Bigby Creek?

It is owned by the County Highway Agency.