US Bridges

Nfa A647 over Coon Creek

Fair

Lawrence County, Tennessee · 1 M.W.SR6 @ Lawrenceberg. · Structure no. 500A6470001

Built
1950
75 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
930
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A647 over Coon Creek is a concrete continuous slab carrying Nfa A647 over Coon Creek in Lawrence 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 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 930 vehicles a day, roughly 2% of them trucks, projected to reach 1,488 by 2042. The structure is 37 ft (11.3 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A647
CrossesCoon Creek
Location1 M.W.SR6 @ Lawrenceberg.
RouteCity Street 647
CountyLawrence County
StateTennessee
Coordinates35.21848, -87.3417
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length37 ft (11.3 m)
Longest span17 ft (5.2 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic930 (2020)
Projected traffic1,488 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$563,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A647 over Coon Creek built?

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

What condition is Nfa A647 over Coon 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 June 2023.

How much traffic does Nfa A647 over Coon Creek carry?

About 930 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A647 over Coon Creek?

The structure is 37 ft (11.3 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns Nfa A647 over Coon Creek?

It is owned by the City or Municipal Highway Agency.