US Bridges

Nfa E071 over Tributary to Bull Run CR

Good

Knox County, Tennessee · Bull Run Dr.-W of SR33 · Structure no. 470E0710003

Built
1950
75 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
180
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa E071 over Tributary to Bull Run CR is a concrete continuous culvert carrying Nfa E071 over Tributary to Bull Run CR in Knox County, Tennessee. It was built in 1950, so it is 75 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 180 vehicles a day, roughly 2% of them trucks, projected to reach 288 by 2040. The structure is 23 ft (7 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa E071
CrossesTributary to Bull Run CR
LocationBull Run Dr.-W of SR33
RouteCounty Highway 71
CountyKnox County
StateTennessee
Coordinates36.15683, -83.95474
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3.1 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic288 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$86,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa E071 over Tributary to Bull Run CR built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nfa E071 over Tributary to Bull Run CR 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 June 2024.

How much traffic does Nfa E071 over Tributary to Bull Run CR carry?

About 180 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa E071 over Tributary to Bull Run CR?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3.1 m) and a deck 23 ft wide.

Who owns Nfa E071 over Tributary to Bull Run CR?

It is owned by the County Highway Agency.