US Bridges

FAS 36 over Watts Branch

Good

Unicoi County, Tennessee · 2.1 M S JCT SR36&SR81 · Structure no. 86SR0360001

Built
1928
97 years old, rebuilt 2015
Condition
Good
inspected October 2024
Type
Tee Beam
Concrete
Length
30 ft
1 main span
Daily traffic
339
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 36 over Watts Branch is a concrete tee beam carrying FAS 36 over Watts Branch in Unicoi County, Tennessee. It was built in 1928 and reconstructed in 2015, so it is 97 years old, older 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 339 vehicles a day, roughly 4% of them trucks, projected to reach 656 by 2040. The structure is 30 ft (9 m) long and 25 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

CarriesFAS 36
CrossesWatts Branch
Location2.1 M S JCT SR36&SR81
RouteU.S. Route 19
Coordinates36.04453, -82.49882
Functional classRural Major 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length30 ft (9 m)
Longest span26 ft (7.9 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic339 (2021)
Projected traffic656 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.9 mi (90 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$134,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 36 over Watts Branch built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 2015.

What condition is FAS 36 over Watts Branch 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 October 2024.

How much traffic does FAS 36 over Watts Branch carry?

About 339 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAS 36 over Watts Branch?

The structure is 30 ft (9 m) long with a longest span of 26 ft (7.9 m) and a deck 25 ft wide.

Who owns FAS 36 over Watts Branch?

It is owned by the State Highway Agency.