US Bridges

Nfa A861 (sa 0618) over Overflow

Good

Bradley County, Tennessee · 3MI East of SR60 · Structure no. 060A8610001

Built
1994
31 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
180
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A861 (sa 0618) over Overflow is a concrete continuous culvert carrying Nfa A861 (sa 0618) over Overflow in Bradley County, Tennessee. It was built in 1994, so it is 31 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 180 vehicles a day, roughly 2% of them trucks, projected to reach 288 by 2039. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A861 (sa 0618)
CrossesOverflow
Location3MI East of SR60
RouteCounty Highway 861
CountyBradley County
StateTennessee
Coordinates35.0294, -84.84837
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width26 ft (8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic288 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 A861 (sa 0618) over Overflow built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nfa A861 (sa 0618) over Overflow 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 Nfa A861 (sa 0618) over Overflow carry?

About 180 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A861 (sa 0618) over Overflow?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa A861 (sa 0618) over Overflow?

It is owned by the County Highway Agency.