US Bridges

Nfa 1798 (sa 4315) over Tumbling Creek

Good

Humphreys County, Tennessee · 3 Mi. Ne. SR 230. · Structure no. 43017980005

Built
1965
60 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
111 ft
3 main spans
Daily traffic
278
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1798 (sa 4315) over Tumbling Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa 1798 (sa 4315) over Tumbling Creek in Humphreys 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 278 vehicles a day, roughly 3% of them trucks, projected to reach 445 by 2042. The structure is 111 ft (33.8 m) long and 29 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesNfa 1798 (sa 4315)
CrossesTumbling Creek
Location3 Mi. Ne. SR 230.
RouteCounty Highway 1798
Coordinates35.97346, -87.6085
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating26.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length111 ft (33.8 m)
Longest span36 ft (11 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic278 (2021)
Projected traffic445 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$125,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1798 (sa 4315) over Tumbling Creek built?

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

What condition is Nfa 1798 (sa 4315) over Tumbling Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Nfa 1798 (sa 4315) over Tumbling Creek carry?

About 278 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1798 (sa 4315) over Tumbling Creek?

The structure is 111 ft (33.8 m) long with a longest span of 36 ft (11 m) and a deck 29 ft wide.

Who owns Nfa 1798 (sa 4315) over Tumbling Creek?

It is owned by the County Highway Agency.