US Bridges

Nfa A118 over Johnson Branch

Fair

Maury County, Tennessee · 3.5 M. Se. Spring Hill. · Structure no. 600A1180001

Built
2000
25 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
7,620
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A118 over Johnson Branch is a concrete continuous culvert carrying Nfa A118 over Johnson Branch in Maury County, Tennessee. It was built in 2000, so it is 25 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 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 7,620 vehicles a day, roughly 11% of them trucks, projected to reach 12,192 by 2040. The structure is 23 ft (7.1 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A118
CrossesJohnson Branch
Location3.5 M. Se. Spring Hill.
RouteCounty Highway 0A118
CountyMaury County
StateTennessee
Coordinates35.70533, -86.95456
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7.1 m)
Longest span10 ft (3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,620 (2020)
Projected traffic12,192 by 2040
Trucks11%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$163,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A118 over Johnson Branch built?

It was built in 2000, making it 25 years old in 2025.

What condition is Nfa A118 over Johnson Branch 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 April 2024.

How much traffic does Nfa A118 over Johnson Branch carry?

About 7,620 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Nfa A118 over Johnson Branch?

The structure is 23 ft (7.1 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns Nfa A118 over Johnson Branch?

It is owned by the County Highway Agency.