US Bridges

Nfa 1739 (sa 2004) over Terrapin Creek

Fair

Decatur County, Tennessee · 3.2 MI NE JCT SR20&SR69 · Structure no. 20017390001

Built
1976
49 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
38 ft
1 main span
Daily traffic
342
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1739 (sa 2004) over Terrapin Creek is a concrete box beam or girders - multiple carrying Nfa 1739 (sa 2004) over Terrapin Creek in Decatur County, Tennessee. It was built in 1976, so it is 49 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.

It carries about 342 vehicles a day, roughly 3% of them trucks, projected to reach 621 by 2042. The structure is 38 ft (11.6 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1739 (sa 2004)
CrossesTerrapin Creek
Location3.2 MI NE JCT SR20&SR69
RouteCounty Highway 1739
CountyDecatur County
StateTennessee
Coordinates35.672, -88.07878
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckOther
Main spans1
Design loadH 15
Structure length38 ft (11.6 m)
Longest span38 ft (11.6 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic342 (2021)
Projected traffic621 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$287,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1739 (sa 2004) over Terrapin Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Nfa 1739 (sa 2004) over Terrapin 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 1739 (sa 2004) over Terrapin Creek carry?

About 342 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1739 (sa 2004) over Terrapin Creek?

The structure is 38 ft (11.6 m) long with a longest span of 38 ft (11.6 m) and a deck 28 ft wide.

Who owns Nfa 1739 (sa 2004) over Terrapin Creek?

It is owned by the County Highway Agency.