US Bridges

Nfa A110 over Robertson Fork Branch

Poor

Giles County, Tennessee · 1 M E of Lynnville · Structure no. 280A1100001

Built
1950
75 years old
Condition
Poor
inspected April 2024
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
180
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A110 over Robertson Fork Branch is a concrete tee beam carrying Nfa A110 over Robertson Fork Branch in Giles County, Tennessee. It was built in 1950, so it is 75 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 180 vehicles a day, roughly 2% of them trucks, projected to reach 288 by 2042. The structure is 42 ft (12.9 m) long and 17 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A110
CrossesRobertson Fork Branch
Location1 M E of Lynnville
RouteCounty Highway 110
CountyGiles County
StateTennessee
Coordinates35.37692, -86.97746
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.9 m)
Longest span41 ft (12.4 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic288 by 2042
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$214,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A110 over Robertson Fork Branch built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nfa A110 over Robertson Fork Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Nfa A110 over Robertson Fork Branch carry?

About 180 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A110 over Robertson Fork Branch?

The structure is 42 ft (12.9 m) long with a longest span of 41 ft (12.4 m) and a deck 17 ft wide.

Who owns Nfa A110 over Robertson Fork Branch?

It is owned by the County Highway Agency.