US Bridges

FAU 3890 over Mad Branch

Fair

Sullivan County, Tennessee · Just NW of SR36-SR126 JCT · Structure no. 82038900003

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
23 ft
3 main spans
Daily traffic
7,621
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 3890 over Mad Branch is a concrete continuous culvert carrying FAU 3890 over Mad Branch in Sullivan County, Tennessee. It was built in 1961, so it is 64 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 7,621 vehicles a day, roughly 4% of them trucks, projected to reach 11,112 by 2042. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAU 3890
CrossesMad Branch
LocationJust NW of SR36-SR126 JCT
RouteCity Street 3890
Coordinates36.5327, -82.52853
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,621 (2021)
Projected traffic11,112 by 2042
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 3890 over Mad Branch built?

It was built in 1961, making it 64 years old in 2025.

What condition is FAU 3890 over Mad Branch 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 March 2024.

How much traffic does FAU 3890 over Mad Branch carry?

About 7,621 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 3890 over Mad Branch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns FAU 3890 over Mad Branch?

It is owned by the City or Municipal Highway Agency.