US Bridges

Nfa 2120 (sa 1615) over Eaton Branch

Fair

Coffee County, Tennessee · 4 MI from Old SR 2 · Structure no. 16021200001

Built
1955
70 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
575
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2120 (sa 1615) over Eaton Branch is a concrete continuous culvert carrying Nfa 2120 (sa 1615) over Eaton Branch in Coffee County, Tennessee. It was built in 1955, so it is 70 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 575 vehicles a day, roughly 3% of them trucks, projected to reach 704 by 2040. The structure is 29 ft (8.8 m) long and 22 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesNfa 2120 (sa 1615)
CrossesEaton Branch
Location4 MI from Old SR 2
RouteCounty Highway 2120
CountyCoffee County
StateTennessee
Coordinates35.54187, -86.13647
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic575 (2021)
Projected traffic704 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$130,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2120 (sa 1615) over Eaton Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is Nfa 2120 (sa 1615) over Eaton 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 March 2024.

How much traffic does Nfa 2120 (sa 1615) over Eaton Branch carry?

About 575 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2120 (sa 1615) over Eaton Branch?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 22 ft wide.

Who owns Nfa 2120 (sa 1615) over Eaton Branch?

It is owned by the County Highway Agency.