US Bridges

Nfa A823 over Myrtlewood Rd. / I75

Good

Knox County, Tennessee · Just NE of SR62 Exit · Structure no. 47I00750015

Built
1981
44 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
310 ft
2 main spans
Daily traffic
730
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa A823 over Myrtlewood Rd. / I75 is a concrete continuous box beam or girders - multiple carrying Nfa A823 over Myrtlewood 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 730 vehicles a day, roughly 2% of them trucks, projected to reach 1,168 by 2041. The structure is 310 ft (94.6 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A823
CrossesMyrtlewood Rd. / I75
LocationJust NE of SR62 Exit
RouteCity Street 823
CountyKnox County
StateTennessee
Coordinates35.97809, -83.97966
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length310 ft (94.6 m)
Longest span170 ft (51.7 m)
Deck width40 ft (12.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic730 (2020)
Projected traffic1,168 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 A823 over Myrtlewood Rd. / I75 built?

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

What condition is Nfa A823 over Myrtlewood 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 A823 over Myrtlewood Rd. / I75 carry?

About 730 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A823 over Myrtlewood Rd. / I75?

The structure is 310 ft (94.6 m) long with a longest span of 170 ft (51.7 m) and a deck 40 ft wide.

Who owns Nfa A823 over Myrtlewood Rd. / I75?

It is owned by the State Highway Agency.