US Bridges

Nfa 2148 (sa 2119) over Dry Branch

Fair

DeKalb County, Tennessee · .3 MI Southwest of Helton · Structure no. 21021480003

Built
1975
50 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
501
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2148 (sa 2119) over Dry Branch is a concrete continuous culvert carrying Nfa 2148 (sa 2119) over Dry Branch in DeKalb County, Tennessee. It was built in 1975, so it is 50 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 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 501 vehicles a day, roughly 3% of them trucks, projected to reach 802 by 2042. The structure is 22 ft (6.7 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesNfa 2148 (sa 2119)
CrossesDry Branch
Location.3 MI Southwest of Helton
RouteCounty Highway 2148
CountyDeKalb County
StateTennessee
Coordinates36.06373, -85.95569
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic501 (2021)
Projected traffic802 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2148 (sa 2119) over Dry Branch built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa 2148 (sa 2119) over Dry 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 December 2023.

How much traffic does Nfa 2148 (sa 2119) over Dry Branch carry?

About 501 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2148 (sa 2119) over Dry Branch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns Nfa 2148 (sa 2119) over Dry Branch?

It is owned by the County Highway Agency.