US Bridges

FAP 34 over South Holston River

Good

Sullivan County, Tennessee · 8 Mi. Ne.Of Johnson Co. · Structure no. 82SR0340025

Built
1949
76 years old, rebuilt 2008
Condition
Good
inspected March 2023
Type
Truss - Thru
Steel Continuous
Length
1,262 ft
2 main spans
Daily traffic
1,904
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 34 over South Holston River is a steel continuous truss - thru carrying FAP 34 over South Holston River in Sullivan County, Tennessee. It was built in 1949 and reconstructed in 2008, so it is 76 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 1,904 vehicles a day, roughly 4% of them trucks, projected to reach 2,614 by 2041. The structure is 1,262 ft (384.7 m) long and 34 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesFAP 34
CrossesSouth Holston River
Location8 Mi. Ne.Of Johnson Co.
RouteU.S. Route 421
CountySullivan County
StateTennessee
Coordinates36.56583, -82.046
Functional classRural Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating33.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckClosed grating
Main spans2 (+4 approach)
Design loadHS 20
Structure length1,262 ft (384.7 m)
Longest span400 ft (121.9 m)
Deck width34 ft (10.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic1,904 (2021)
Projected traffic2,614 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.2 mi (84 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$21.1 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 34 over South Holston River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2008.

What condition is FAP 34 over South Holston River 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 March 2023.

How much traffic does FAP 34 over South Holston River carry?

About 1,904 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAP 34 over South Holston River?

The structure is 1,262 ft (384.7 m) long with a longest span of 400 ft (121.9 m) and a deck 34 ft wide.

Who owns FAP 34 over South Holston River?

It is owned by the State Highway Agency.