US Bridges

Nfa A528 over Knob Creek

Fair

Washington County, Tennessee · E Off SR34-.5 M N of SR36 · Structure no. 900A5280001

Built
1992
33 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
5,990
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A528 over Knob Creek is a concrete continuous culvert carrying Nfa A528 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 5,990 vehicles a day, roughly 2% of them trucks, projected to reach 9,584 by 2042. The structure is 27 ft (8.3 m) long and 50 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A528
CrossesKnob Creek
LocationE Off SR34-.5 M N of SR36
RouteCity Street 528
CountyWashington County
StateTennessee
Coordinates36.36367, -82.38197
Functional classUrban Local

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 length27 ft (8.3 m)
Longest span12 ft (3.8 m)
Deck width50 ft (15.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,990 (2020)
Projected traffic9,584 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$290,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A528 over Knob Creek built?

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

What condition is Nfa A528 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 June 2024.

How much traffic does Nfa A528 over Knob Creek carry?

About 5,990 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A528 over Knob Creek?

The structure is 27 ft (8.3 m) long with a longest span of 12 ft (3.8 m) and a deck 50 ft wide.

Who owns Nfa A528 over Knob Creek?

It is owned by the City or Municipal Highway Agency.