US Bridges

Nfa A608 over Cartwright Creek

Fair

Williamson County, Tennessee · 0.9 MI E JCT SR46&SR106 · Structure no. 940A6080001

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
270
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A608 over Cartwright Creek is a concrete continuous culvert carrying Nfa A608 over Cartwright Creek in Williamson County, Tennessee. It was built in 1965, so it is 60 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 270 vehicles a day, roughly 2% of them trucks, projected to reach 432 by 2041. The structure is 22 ft (6.7 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A608
CrossesCartwright Creek
Location0.9 MI E JCT SR46&SR106
RouteCity Street 608
CountyWilliamson County
StateTennessee
Coordinates36.00387, -86.87054
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2020)
Projected traffic432 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$2,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A608 over Cartwright Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Nfa A608 over Cartwright 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 July 2023.

How much traffic does Nfa A608 over Cartwright Creek carry?

About 270 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A608 over Cartwright Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 38 ft wide.

Who owns Nfa A608 over Cartwright Creek?

It is owned by the County Highway Agency.