US Bridges

FAU 3946 over SR 386

Good

Sumner County, Tennessee · 3.8 M SW JCT SR174&SR258 · Structure no. 83SR3860007

Built
1989
36 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
136 ft
2 main spans
Daily traffic
4,641
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 3946 over SR 386 is a prestressed concrete continuous box beam or girders - single or spread carrying FAU 3946 over SR 386 in Sumner County, Tennessee. It was built in 1989, so it is 36 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,641 vehicles a day, roughly 3% of them trucks, projected to reach 6,704 by 2040. The structure is 136 ft (41.4 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAU 3946
CrossesSR 386
Location3.8 M SW JCT SR174&SR258
RouteCity Street 3946
CountySumner County
StateTennessee
Coordinates36.31913, -86.64045
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length136 ft (41.4 m)
Longest span68 ft (20.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,641 (2021)
Projected traffic6,704 by 2040
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 3946 over SR 386 built?

It was built in 1989, making it 36 years old in 2025.

What condition is FAU 3946 over SR 386 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does FAU 3946 over SR 386 carry?

About 4,641 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is FAU 3946 over SR 386?

The structure is 136 ft (41.4 m) long with a longest span of 68 ft (20.7 m) and a deck 30 ft wide.

Who owns FAU 3946 over SR 386?

It is owned by the State Highway Agency.