US Bridges

Nfa A166 over Gravelly Run Creek

Fair

Humphreys County, Tennessee · On White Oak Rd. · Structure no. 430A1660005

Built
1984
41 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
120
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A166 over Gravelly Run Creek is a concrete continuous culvert carrying Nfa A166 over Gravelly Run Creek in Humphreys County, Tennessee. It was built in 1984, so it is 41 years old, younger 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 120 vehicles a day, roughly 2% of them trucks, projected to reach 192 by 2042. The structure is 37 ft (11.4 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa A166
CrossesGravelly Run Creek
LocationOn White Oak Rd.
RouteCounty Highway 166
CountyHumphreys County
StateTennessee
Coordinates36.1772, -87.6179
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 protection7 GoodSome minor problems.
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to 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
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length37 ft (11.4 m)
Longest span15 ft (4.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic192 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$97,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A166 over Gravelly Run Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A166 over Gravelly Run 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 A166 over Gravelly Run Creek carry?

About 120 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A166 over Gravelly Run Creek?

The structure is 37 ft (11.4 m) long with a longest span of 15 ft (4.6 m) and a deck 25 ft wide.

Who owns Nfa A166 over Gravelly Run Creek?

It is owned by the County Highway Agency.