US Bridges

Nfa A742 over Marrowbone Creek

FairPosted for load

Davidson County, Tennessee · Marrowbone Lake Rd. · Structure no. 190C5540001

Built
1940
85 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
69 ft
1 main span
Daily traffic
60
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A742 over Marrowbone Creek is a steel truss - thru carrying Nfa A742 over Marrowbone Creek in Davidson County, Tennessee. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 60 vehicles a day, roughly 2% of them trucks, projected to reach 96 by 2042. The structure is 69 ft (21 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A742
CrossesMarrowbone Creek
LocationMarrowbone Lake Rd.
RouteCity Street 742
CountyDavidson County
StateTennessee
Coordinates36.30335, -86.91949
Functional classRural 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment6: Equal to present minimum criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length69 ft (21 m)
Longest span66 ft (20.1 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2020)
Projected traffic96 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$209,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A742 over Marrowbone Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa A742 over Marrowbone 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 A742 over Marrowbone Creek carry?

About 60 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A742 over Marrowbone Creek?

The structure is 69 ft (21 m) long with a longest span of 66 ft (20.1 m) and a deck 21 ft wide.

Who owns Nfa A742 over Marrowbone Creek?

It is owned by the City or Municipal Highway Agency.