US Bridges

FAU 4870 over SR 386

Fair

Sumner County, Tennessee · 3.6 MI NE JCT SR 6 &SR258 · Structure no. 83SR3860023

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
6,515
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 4870 over SR 386 is a concrete continuous box beam or girders - single or spread carrying FAU 4870 over SR 386 in Sumner County, Tennessee. It was built in 1981, so it is 44 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 6,515 vehicles a day, roughly 3% of them trucks, projected to reach 6,565 by 2042. The structure is 233 ft (71 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAU 4870
CrossesSR 386
Location3.6 MI NE JCT SR 6 &SR258
RouteCity Street 4870
CountySumner County
StateTennessee
Coordinates36.33143, -86.57882
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating36.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length233 ft (71 m)
Longest span120 ft (36.6 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,515 (2021)
Projected traffic6,565 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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$2.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 4870 over SR 386 built?

It was built in 1981, making it 44 years old in 2025.

What condition is FAU 4870 over SR 386 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 September 2024.

How much traffic does FAU 4870 over SR 386 carry?

About 6,515 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is FAU 4870 over SR 386?

The structure is 233 ft (71 m) long with a longest span of 120 ft (36.6 m) and a deck 30 ft wide.

Who owns FAU 4870 over SR 386?

It is owned by the State Highway Agency.