US Bridges

Nfa A505 over Big Fiery Gizzard Creek

Fair

Marion County, Tennessee · 3.5 MI NE JCT I24&SR2 · Structure no. 580A5050005

Built
1992
33 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
90 ft
2 main spans
Daily traffic
50
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A505 over Big Fiery Gizzard Creek is a concrete continuous tee beam carrying Nfa A505 over Big Fiery Gizzard Creek in Marion County, Tennessee. It was built in 1992, so it is 33 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 6 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 80 by 2040. The structure is 90 ft (27.4 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A505
CrossesBig Fiery Gizzard Creek
Location3.5 MI NE JCT I24&SR2
RouteCounty Highway 505
CountyMarion County
StateTennessee
Coordinates35.14962, -85.70592
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating96.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span45 ft (13.7 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic80 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A505 over Big Fiery Gizzard Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nfa A505 over Big Fiery Gizzard 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 October 2024.

How much traffic does Nfa A505 over Big Fiery Gizzard Creek carry?

About 50 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A505 over Big Fiery Gizzard Creek?

The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 25 ft wide.

Who owns Nfa A505 over Big Fiery Gizzard Creek?

It is owned by the County Highway Agency.