US Bridges

Nfa A099 over South Fork Blue Creek

Fair

Humphreys County, Tennessee · 0.2 M. N. of I40 · Structure no. 430A3020001

Built
1968
57 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
102 ft
2 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A099 over South Fork Blue Creek is a concrete tee beam carrying Nfa A099 over South Fork Blue Creek in Humphreys County, Tennessee. It was built in 1968, so it is 57 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 5 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 20 vehicles a day, roughly 4% of them trucks, projected to reach 32 by 2042. The structure is 102 ft (31.1 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa A099
CrossesSouth Fork Blue Creek
Location0.2 M. N. of I40
RouteCounty Highway 99
CountyHumphreys County
StateTennessee
Coordinates35.86424, -87.90797
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span51 ft (15.5 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic32 by 2042
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$623,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A099 over South Fork Blue Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is Nfa A099 over South Fork Blue 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 November 2023.

How much traffic does Nfa A099 over South Fork Blue Creek carry?

About 20 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A099 over South Fork Blue Creek?

The structure is 102 ft (31.1 m) long with a longest span of 51 ft (15.5 m) and a deck 16 ft wide.

Who owns Nfa A099 over South Fork Blue Creek?

It is owned by the County Highway Agency.