US Bridges

Nfa C646 over Browns Creek

Fair

Davidson County, Tennessee · Bates DR @ Caldwell Ln. · Structure no. 190B5900001

Built
1950
75 years old
Condition
Fair
inspected June 2023
Type
Channel Beam
Concrete
Length
33 ft
1 main span
Daily traffic
440
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa C646 over Browns Creek is a concrete channel beam carrying Nfa C646 over Browns Creek in Davidson 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 440 vehicles a day, roughly 2% of them trucks, projected to reach 704 by 2041. The structure is 33 ft (10.1 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNfa C646
CrossesBrowns Creek
LocationBates DR @ Caldwell Ln.
RouteCity Street 646
CountyDavidson County
StateTennessee
Coordinates36.10822, -86.78523
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
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 typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2020)
Projected traffic704 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$104,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa C646 over Browns Creek built?

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

What condition is Nfa C646 over Browns 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 C646 over Browns Creek carry?

About 440 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa C646 over Browns Creek?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.

Who owns Nfa C646 over Browns Creek?

It is owned by the City or Municipal Highway Agency.