US Bridges

Nfa B120 over Murray Rd. / I75

Fair

Knox County, Tennessee · S of SR131-I75 Exit · Structure no. 47I00750035

Built
1969
56 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete Continuous
Length
221 ft
4 main spans
Daily traffic
2,320
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa B120 over Murray Rd. / I75 is a concrete continuous tee beam carrying Nfa B120 over Murray Rd. / I75 in Knox County, Tennessee. It was built in 1969, so it is 56 years old, older 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 2,320 vehicles a day, roughly 2% of them trucks, projected to reach 3,712 by 2041. The structure is 221 ft (67.5 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa B120
CrossesMurray Rd. / I75
LocationS of SR131-I75 Exit
RouteCity Street 120
CountyKnox County
StateTennessee
Coordinates36.01648, -83.98589
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating61.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length221 ft (67.5 m)
Longest span66 ft (20.2 m)
Deck width40 ft (12.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,320 (2020)
Projected traffic3,712 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa B120 over Murray Rd. / I75 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nfa B120 over Murray Rd. / I75 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 January 2025.

How much traffic does Nfa B120 over Murray Rd. / I75 carry?

About 2,320 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa B120 over Murray Rd. / I75?

The structure is 221 ft (67.5 m) long with a longest span of 66 ft (20.2 m) and a deck 40 ft wide.

Who owns Nfa B120 over Murray Rd. / I75?

It is owned by the State Highway Agency.