US Bridges

Nfa A170 over White Oak Creek

Fair

McNairy County, Tennessee · 1 MI S of Chester Co. · Structure no. 550A1700001

Built
1987
38 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
95 ft
3 main spans
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A170 over White Oak Creek is a prestressed concrete box beam or girders - single or spread carrying Nfa A170 over White Oak Creek in McNairy County, Tennessee. It was built in 1987, so it is 38 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 30 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2040. The structure is 95 ft (29.1 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A170
CrossesWhite Oak Creek
Location1 MI S of Chester Co.
RouteCounty Highway 170
CountyMcNairy County
StateTennessee
Coordinates35.37255, -88.38489
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length95 ft (29.1 m)
Longest span32 ft (9.8 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A170 over White Oak Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Nfa A170 over White Oak 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 August 2024.

How much traffic does Nfa A170 over White Oak Creek carry?

About 30 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A170 over White Oak Creek?

The structure is 95 ft (29.1 m) long with a longest span of 32 ft (9.8 m) and a deck 26 ft wide.

Who owns Nfa A170 over White Oak Creek?

It is owned by the County Highway Agency.