US Bridges

Nfa 1585 over Overflow

PoorPosted for load

Gibson County, Tennessee · 3.4 MI NE JCT SR43&SR77 · Structure no. 27015850005

Built
1971
54 years old, rebuilt 1998
Condition
Poor
inspected September 2023
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
93
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1585 over Overflow is a concrete channel beam carrying Nfa 1585 over Overflow in Gibson County, Tennessee. It was built in 1971 and reconstructed in 1998, so it is 54 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 4 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: posted for load restriction.

It carries about 93 vehicles a day, roughly 2% of them trucks, projected to reach 149 by 2042. The structure is 38 ft (11.6 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa 1585
CrossesOverflow
Location3.4 MI NE JCT SR43&SR77
RouteCounty Highway 1585
Coordinates35.95806, -88.73797
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93 (2021)
Projected traffic149 by 2042
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$482,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1585 over Overflow built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1998.

What condition is Nfa 1585 over Overflow 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 September 2023.

How much traffic does Nfa 1585 over Overflow carry?

About 93 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Nfa 1585 over Overflow?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 22 ft wide.

Who owns Nfa 1585 over Overflow?

It is owned by the County Highway Agency.