US Bridges

Nfa 947 over I75

Fair

McMinn County, Tennessee · 1.1 MI S Brad Mcminn C L · Structure no. 54I00750001

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
340 ft
3 main spans
Daily traffic
2,262
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa 947 over I75 is a prestressed concrete box beam or girders - multiple carrying Nfa 947 over I75 in McMinn County, Tennessee. It was built in 1972, so it is 53 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 5 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 2,262 vehicles a day, roughly 3% of them trucks, projected to reach 3,088 by 2040. The structure is 340 ft (103.6 m) long and 50 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesNfa 947
CrossesI75
Location1.1 MI S Brad Mcminn C L
RouteCounty Highway 947
CountyMcMinn County
StateTennessee
Coordinates35.32494, -84.78286
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 rating47.2 US tons
Inventory rating36.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length340 ft (103.6 m)
Longest span120 ft (36.6 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,262 (2021)
Projected traffic3,088 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed29.8 mi (48 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 947 over I75 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Nfa 947 over 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 April 2024.

How much traffic does Nfa 947 over I75 carry?

About 2,262 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 947 over I75?

The structure is 340 ft (103.6 m) long with a longest span of 120 ft (36.6 m) and a deck 50 ft wide.

Who owns Nfa 947 over I75?

It is owned by the State Highway Agency.