US Bridges

FAS 423 over Overflow

Fair

Carroll County, Tennessee · 3.8 MI SW JCT SR77&HENRY · Structure no. 09S80380003

Built
1956
69 years old
Condition
Fair
inspected July 2023
Type
Channel Beam
Concrete
Length
57 ft
3 main spans
Daily traffic
265
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 423 over Overflow is a concrete channel beam carrying FAS 423 over Overflow in Carroll County, Tennessee. It was built in 1956, so it is 69 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 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 265 vehicles a day, roughly 5% of them trucks, projected to reach 416 by 2039. The structure is 57 ft (17.4 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS 423
CrossesOverflow
Location3.8 MI SW JCT SR77&HENRY
RouteState Highway 423
CountyCarroll County
StateTennessee
Coordinates36.12842, -88.38831
Functional classRural Major 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
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length57 ft (17.4 m)
Longest span20 ft (6.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic265 (2021)
Projected traffic416 by 2039
Trucks5%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$391,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 423 over Overflow built?

It was built in 1956, making it 69 years old in 2025.

What condition is FAS 423 over Overflow 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 July 2023.

How much traffic does FAS 423 over Overflow carry?

About 265 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is FAS 423 over Overflow?

The structure is 57 ft (17.4 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns FAS 423 over Overflow?

It is owned by the State Highway Agency.