US Bridges

Nfa A378 over Rockhouse Creek

Fair

Lewis County, Tennessee · 4.5 M. S. Hohenwald. · Structure no. 510A3780001

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
90
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A378 over Rockhouse Creek is a steel stringer/multi-beam or girder carrying Nfa A378 over Rockhouse Creek in Lewis County, Tennessee. It was built in 1980, so it is 45 years old, younger 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 90 vehicles a day, roughly 7% of them trucks, projected to reach 144 by 2041. The structure is 34 ft (10.4 m) long and 13 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A378
CrossesRockhouse Creek
Location4.5 M. S. Hohenwald.
RouteCounty Highway 378
CountyLewis County
StateTennessee
Coordinates35.48, -87.57402
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating45.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span32 ft (9.7 m)
Deck width13 ft (4 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2020)
Projected traffic144 by 2041
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$181,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A378 over Rockhouse Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Nfa A378 over Rockhouse 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 A378 over Rockhouse Creek carry?

About 90 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Nfa A378 over Rockhouse Creek?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.7 m) and a deck 13 ft wide.

Who owns Nfa A378 over Rockhouse Creek?

It is owned by the County Highway Agency.