US Bridges

SR 9 over SR9 Rmp to I75-SB / SR9

Good

Knox County, Tennessee · At Sharps Gap Exchange · Structure no. 47SR0090015

Built
1981
44 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
177 ft
2 main spans
Daily traffic
21,084
2021 count
Owner
State
State Highway Agency

About this bridge

SR 9 over SR9 Rmp to I75-SB / SR9 is a steel continuous stringer/multi-beam or girder carrying SR 9 over SR9 Rmp to I75-SB / SR9 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 21,084 vehicles a day, roughly 6% of them trucks, projected to reach 35,082 by 2042. The structure is 177 ft (54 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 9
CrossesSR9 Rmp to I75-SB / SR9
LocationAt Sharps Gap Exchange
RouteU.S. Route 9
CountyKnox County
StateTennessee
Coordinates35.99863, -83.96045
Functional classUrban Other Principal Arterial

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length177 ft (54 m)
Longest span92 ft (28 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,084 (2021)
Projected traffic35,082 by 2042
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 SR 9 over SR9 Rmp to I75-SB / SR9 built?

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

What condition is SR 9 over SR9 Rmp to I75-SB / SR9 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 September 2023.

How much traffic does SR 9 over SR9 Rmp to I75-SB / SR9 carry?

About 21,084 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR 9 over SR9 Rmp to I75-SB / SR9?

The structure is 177 ft (54 m) long with a longest span of 92 ft (28 m) and a deck 32 ft wide.

Who owns SR 9 over SR9 Rmp to I75-SB / SR9?

It is owned by the State Highway Agency.