US Bridges

FAP 34 over Knob Creek

Good

Washington County, Tennessee · .3 M N JCT SR34&SR36 · Structure no. 90SR0340009

Built
2012
13 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
27,950
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 34 over Knob Creek is a prestressed concrete continuous box beam or girders - single or spread carrying FAP 34 over Knob Creek in Washington County, Tennessee. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 27,950 vehicles a day, roughly 4% of them trucks, projected to reach 31,840 by 2042. The structure is 120 ft (36.6 m) long and 76 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesFAP 34
CrossesKnob Creek
Location.3 M N JCT SR34&SR36
RouteU.S. Route 11
Coordinates36.36061, -82.384
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating50.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length120 ft (36.6 m)
Longest span50 ft (15.2 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,950 (2021)
Projected traffic31,840 by 2042
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 FAP 34 over Knob Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is FAP 34 over Knob Creek 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 2023.

How much traffic does FAP 34 over Knob Creek carry?

About 27,950 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAP 34 over Knob Creek?

The structure is 120 ft (36.6 m) long with a longest span of 50 ft (15.2 m) and a deck 76 ft wide.

Who owns FAP 34 over Knob Creek?

It is owned by the State Highway Agency.