US Bridges

Nfa C056 over Bob Gray Rd. / SR 162

Fair

Knox County, Tennessee · Just S of SR162-SR131 JCT · Structure no. 47SR1620009

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
284 ft
4 main spans
Daily traffic
3,369
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa C056 over Bob Gray Rd. / SR 162 is a prestressed concrete stringer/multi-beam or girder carrying Nfa C056 over Bob Gray Rd. / SR 162 in Knox County, Tennessee. It was built in 1973, so it is 52 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 3,369 vehicles a day, roughly 1% of them trucks, projected to reach 5,390 by 2042. The structure is 284 ft (86.6 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa C056
CrossesBob Gray Rd. / SR 162
LocationJust S of SR162-SR131 JCT
RouteCounty Highway 5941
Coordinates35.93132, -84.14132
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.3 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span77 ft (23.5 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,369 (2021)
Projected traffic5,390 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 C056 over Bob Gray Rd. / SR 162 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Nfa C056 over Bob Gray Rd. / SR 162 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 February 2024.

How much traffic does Nfa C056 over Bob Gray Rd. / SR 162 carry?

About 3,369 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa C056 over Bob Gray Rd. / SR 162?

The structure is 284 ft (86.6 m) long with a longest span of 77 ft (23.5 m) and a deck 36 ft wide.

Who owns Nfa C056 over Bob Gray Rd. / SR 162?

It is owned by the State Highway Agency.