US Bridges

Nfa 847 (sa 3818) over I40

Fair

Haywood County, Tennessee · 0.1 M S of SR001 · Structure no. 38I00400043

Built
1959
66 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
245 ft
4 main spans
Daily traffic
471
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa 847 (sa 3818) over I40 is a prestressed concrete box beam or girders - multiple carrying Nfa 847 (sa 3818) over I40 in Haywood County, Tennessee. It was built in 1959, so it is 66 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 471 vehicles a day, roughly 3% of them trucks, projected to reach 614 by 2042. The structure is 245 ft (74.7 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa 847 (sa 3818)
CrossesI40
Location0.1 M S of SR001
RouteCounty Highway 847
CountyHaywood County
StateTennessee
Coordinates35.57711, -89.11972
Functional classRural Minor 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 inspectionAugust 2023
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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length245 ft (74.7 m)
Longest span70 ft (21.3 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic471 (2021)
Projected traffic614 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa 847 (sa 3818) over I40 built?

It was built in 1959, making it 66 years old in 2025.

What condition is Nfa 847 (sa 3818) over I40 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 August 2023.

How much traffic does Nfa 847 (sa 3818) over I40 carry?

About 471 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 847 (sa 3818) over I40?

The structure is 245 ft (74.7 m) long with a longest span of 70 ft (21.3 m) and a deck 34 ft wide.

Who owns Nfa 847 (sa 3818) over I40?

It is owned by the State Highway Agency.