US Bridges

Nfa A475 over Boones Creek

Fair

Washington County, Tennessee · 0.6 M NE of I181-SR345 Jc · Structure no. 900A4750001

Built
1979
46 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
1,130
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A475 over Boones Creek is a concrete continuous culvert carrying Nfa A475 over Boones Creek in Washington County, Tennessee. It was built in 1979, so it is 46 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 1,130 vehicles a day, roughly 2% of them trucks, projected to reach 1,808 by 2042. The structure is 38 ft (11.5 m) long and 45 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A475
CrossesBoones Creek
Location0.6 M NE of I181-SR345 Jc
RouteCity Street 475
CountyWashington County
StateTennessee
Coordinates36.38265, -82.4179
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: 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 spans3
Design loadHS 20
Structure length38 ft (11.5 m)
Longest span15 ft (4.6 m)
Deck width45 ft (13.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,130 (2020)
Projected traffic1,808 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A475 over Boones Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Nfa A475 over Boones 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 A475 over Boones Creek carry?

About 1,130 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A475 over Boones Creek?

The structure is 38 ft (11.5 m) long with a longest span of 15 ft (4.6 m) and a deck 45 ft wide.

Who owns Nfa A475 over Boones Creek?

It is owned by the City or Municipal Highway Agency.