US Bridges

Nfa 1783 over Erin Branch

Poor

Houston County, Tennessee · Tank Hill Rd. in Erin. · Structure no. 420A1450001

Built
1965
60 years old
Condition
Poor
inspected February 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
310
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa 1783 over Erin Branch is a concrete continuous culvert carrying Nfa 1783 over Erin Branch in Houston County, Tennessee. It was built in 1965, so it is 60 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 310 vehicles a day, roughly 3% of them trucks, projected to reach 496 by 2042. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNfa 1783
CrossesErin Branch
LocationTank Hill Rd. in Erin.
RouteCity Street 1783
CountyHouston County
StateTennessee
Coordinates36.31697, -87.69566
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2021)
Projected traffic496 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 of existing bridge without deck rehabilitation
Estimated improvement cost$68,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1783 over Erin Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Nfa 1783 over Erin Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does Nfa 1783 over Erin Branch carry?

About 310 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1783 over Erin Branch?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa 1783 over Erin Branch?

It is owned by the City or Municipal Highway Agency.