US Bridges

Nfa A137 over Mill Creek

Fair

Hickman County, Tennessee · 1 M N of Nunnelly · Structure no. 410A1670001

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
68 ft
3 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A137 over Mill Creek is a concrete continuous culvert carrying Nfa A137 over Mill Creek in Hickman County, Tennessee. It was built in 1975, so it is 50 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 2% of them trucks, projected to reach 32 by 2041. The structure is 68 ft (20.7 m) long and 20 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A137
CrossesMill Creek
Location1 M N of Nunnelly
RouteCounty Highway 137
CountyHickman County
StateTennessee
Coordinates35.8756, -87.45462
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length68 ft (20.7 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic32 by 2041
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$170,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A137 over Mill Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa A137 over Mill 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 A137 over Mill Creek carry?

About 20 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A137 over Mill Creek?

The structure is 68 ft (20.7 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns Nfa A137 over Mill Creek?

It is owned by the County Highway Agency.