US Bridges

Nfa 1708 over Prong Doe Creek

Fair

Decatur County, Tennessee · 4.8 MI SW JCT SR114&SR202 · Structure no. 200A3230003

Built
1986
39 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
96
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1708 over Prong Doe Creek is a concrete continuous culvert carrying Nfa 1708 over Prong Doe Creek in Decatur County, Tennessee. It was built in 1986, so it is 39 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 5 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 96 vehicles a day, roughly 2% of them trucks, projected to reach 154 by 2042. The structure is 27 ft (8.2 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa 1708
CrossesProng Doe Creek
Location4.8 MI SW JCT SR114&SR202
RouteCounty Highway 1708
CountyDecatur County
StateTennessee
Coordinates35.44814, -88.24161
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.8 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2021)
Projected traffic154 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 1708 over Prong Doe Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa 1708 over Prong Doe 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 January 2024.

How much traffic does Nfa 1708 over Prong Doe Creek carry?

About 96 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Nfa 1708 over Prong Doe Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.8 m) and a deck 25 ft wide.

Who owns Nfa 1708 over Prong Doe Creek?

It is owned by the County Highway Agency.