US Bridges

FAP 34 over Knob Creek

Fair

Washington County, Tennessee · 1.6 M NE of I181 · Structure no. 90SR3810005

Built
1992
33 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
27,950
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 34 over Knob Creek is a concrete continuous culvert carrying FAP 34 over Knob Creek in Washington 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 27,950 vehicles a day, roughly 4% of them trucks, projected to reach 31,840 by 2042. The structure is 26 ft (8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAP 34
CrossesKnob Creek
Location1.6 M NE of I181
RouteState Highway 34
CountyWashington County
StateTennessee
Coordinates36.36728, -82.37812
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 inspectionOctober 2023
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 rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (8 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,950 (2021)
Projected traffic31,840 by 2042
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

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

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

What condition is FAP 34 over Knob Creek 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 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 26 ft (8 m) long with a longest span of 12 ft (3.8 m).

Who owns FAP 34 over Knob Creek?

It is owned by the State Highway Agency.