US Bridges

Nfa A075 over Lynnwood Branch

Fair

Williamson County, Tennessee · 2.7 MI S JCT SR46&SR106 · Structure no. 940A0750001

Built
1950
75 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
79 ft
3 main spans
Daily traffic
350
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A075 over Lynnwood Branch is a concrete tee beam carrying Nfa A075 over Lynnwood Branch in Williamson 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 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 350 vehicles a day, roughly 2% of them trucks, projected to reach 560 by 2041. The structure is 79 ft (24.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNfa A075
CrossesLynnwood Branch
Location2.7 MI S JCT SR46&SR106
RouteCounty Highway 75
CountyWilliamson County
StateTennessee
Coordinates35.97295, -86.89339
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 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 spans3
Design loadH 15
Structure length79 ft (24.1 m)
Longest span26 ft (7.9 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2020)
Projected traffic560 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 A075 over Lynnwood Branch built?

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

What condition is Nfa A075 over Lynnwood 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 July 2023.

How much traffic does Nfa A075 over Lynnwood Branch carry?

About 350 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A075 over Lynnwood Branch?

The structure is 79 ft (24.1 m) long with a longest span of 26 ft (7.9 m) and a deck 28 ft wide.

Who owns Nfa A075 over Lynnwood Branch?

It is owned by the County Highway Agency.