US Bridges

FAU 3894 over Rock Spring Branch

Fair

Sullivan County, Tennessee · .2 MI NE of I181 · Structure no. 82038940005

Built
1992
33 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
4,724
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 3894 over Rock Spring Branch is a concrete continuous culvert carrying FAU 3894 over Rock Spring Branch in Sullivan County, Tennessee. It was built in 1992, so it is 33 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 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 4,724 vehicles a day, roughly 6% of them trucks, projected to reach 6,774 by 2042. The structure is 37 ft (11.3 m) long and 50 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFAU 3894
CrossesRock Spring Branch
Location.2 MI NE of I181
RouteCity Street 3894
CountySullivan County
StateTennessee
Coordinates36.47682, -82.54107
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width50 ft (15.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,724 (2021)
Projected traffic6,774 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 3894 over Rock Spring Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is FAU 3894 over Rock Spring 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 January 2024.

How much traffic does FAU 3894 over Rock Spring Branch carry?

About 4,724 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is FAU 3894 over Rock Spring Branch?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m) and a deck 50 ft wide.

Who owns FAU 3894 over Rock Spring Branch?

It is owned by the City or Municipal Highway Agency.