US Bridges

Nfa 1818 (sa 4307) over Dry Creek

Fair

Humphreys County, Tennessee · 3.5 M. W. SR13. 1M.N. SR1 · Structure no. 43018180001

Built
1984
41 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
624
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1818 (sa 4307) over Dry Creek is a concrete continuous culvert carrying Nfa 1818 (sa 4307) over Dry Creek in Humphreys County, Tennessee. It was built in 1984, so it is 41 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 624 vehicles a day, roughly 3% of them trucks, projected to reach 998 by 2042. The structure is 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesNfa 1818 (sa 4307)
CrossesDry Creek
Location3.5 M. W. SR13. 1M.N. SR1
RouteCounty Highway 1818
CountyHumphreys County
StateTennessee
Coordinates36.09187, -87.86598
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 inspectionSeptember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic624 (2021)
Projected traffic998 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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$98,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1818 (sa 4307) over Dry Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa 1818 (sa 4307) over Dry 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 September 2023.

How much traffic does Nfa 1818 (sa 4307) over Dry Creek carry?

About 624 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1818 (sa 4307) over Dry Creek?

The structure is 30 ft (9.1 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa 1818 (sa 4307) over Dry Creek?

It is owned by the County Highway Agency.