US Bridges

Nfa B150 over Tillery Rd. / I75

Good

Knox County, Tennessee · Just N of Sharps Gap · Structure no. 47I00750029

Built
1981
44 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
286 ft
2 main spans
Daily traffic
4,350
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa B150 over Tillery Rd. / I75 is a steel continuous stringer/multi-beam or girder carrying Nfa B150 over Tillery Rd. / I75 in Knox County, Tennessee. It was built in 1981, so it is 44 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 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 4,350 vehicles a day, roughly 2% of them trucks, projected to reach 6,960 by 2041. The structure is 286 ft (87.2 m) long and 40 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNfa B150
CrossesTillery Rd. / I75
LocationJust N of Sharps Gap
RouteCity Street 150
CountyKnox County
StateTennessee
Coordinates36.00327, -83.96275
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length286 ft (87.2 m)
Longest span143 ft (43.6 m)
Deck width40 ft (12.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,350 (2020)
Projected traffic6,960 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$373,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa B150 over Tillery Rd. / I75 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Nfa B150 over Tillery Rd. / I75 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 January 2025.

How much traffic does Nfa B150 over Tillery Rd. / I75 carry?

About 4,350 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa B150 over Tillery Rd. / I75?

The structure is 286 ft (87.2 m) long with a longest span of 143 ft (43.6 m) and a deck 40 ft wide.

Who owns Nfa B150 over Tillery Rd. / I75?

It is owned by the State Highway Agency.