US Bridges

Nfa A631 over Big Sewee Creek

Fair

McMinn County, Tennessee · .02 MI North of SR68 · Structure no. 540Z0010001

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
27 ft
3 main spans
Daily traffic
350
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A631 over Big Sewee Creek is a concrete continuous culvert carrying Nfa A631 over Big Sewee Creek in McMinn County, Tennessee. It was built in 1970, so it is 55 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 350 vehicles a day, roughly 2% of them trucks, projected to reach 560 by 2042. The structure is 27 ft (8.1 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesNfa A631
CrossesBig Sewee Creek
Location.02 MI North of SR68
RouteCounty Highway 631
CountyMcMinn County
StateTennessee
Coordinates35.61509, -84.57953
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2020)
Projected traffic560 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A631 over Big Sewee Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa A631 over Big Sewee Creek 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 September 2023.

How much traffic does Nfa A631 over Big Sewee Creek carry?

About 350 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A631 over Big Sewee Creek?

The structure is 27 ft (8.1 m) long with a longest span of 8 ft (2.4 m).

Who owns Nfa A631 over Big Sewee Creek?

It is owned by the County Highway Agency.