US Bridges

Nfa D940 over Johnson Branch

FairPosted for load

Hamilton County, Tennessee · .1 MI N of Ga-Tn State LN · Structure no. 33021520001

Built
1935
90 years old, rebuilt 1970
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
2,633
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa D940 over Johnson Branch is a concrete continuous slab carrying Nfa D940 over Johnson Branch in Hamilton County, Tennessee. It was built in 1935 and reconstructed in 1970, so it is 90 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 2,633 vehicles a day, roughly 1% of them trucks, projected to reach 4,213 by 2042. The structure is 23 ft (7 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa D940
CrossesJohnson Branch
Location.1 MI N of Ga-Tn State LN
RouteCounty Highway 5781
CountyHamilton County
StateTennessee
Coordinates34.98777, -85.06287
Functional classUrban Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
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 typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length23 ft (7 m)
Longest span10 ft (2.9 m)
Deck width29 ft (8.8 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,633 (2021)
Projected traffic4,213 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 with deck rehabilitation or replacement
Estimated improvement cost$139,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa D940 over Johnson Branch built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1970.

What condition is Nfa D940 over Johnson Branch 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 February 2024.

How much traffic does Nfa D940 over Johnson Branch carry?

About 2,633 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa D940 over Johnson Branch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (2.9 m) and a deck 29 ft wide.

Who owns Nfa D940 over Johnson Branch?

It is owned by the County Highway Agency.