US Bridges

Nfa A623 over Slough Creek

Fair

Dyer County, Tennessee · 4 MI S of SR 20 · Structure no. 230A6230001

Built
2012
13 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
1 main span
Daily traffic
40
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A623 over Slough Creek is a steel stringer/multi-beam or girder carrying Nfa A623 over Slough Creek in Dyer County, Tennessee. It was built in 2012, so it is 13 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 6 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 40 vehicles a day, roughly 2% of them trucks, projected to reach 64 by 2042. The structure is 90 ft (27.3 m) long and 21 ft wide. If it were closed, the detour would be 61.5 mi (99 km).

Location

Open in Google Maps
CarriesNfa A623
CrossesSlough Creek
Location4 MI S of SR 20
RouteCounty Highway 623
CountyDyer County
StateTennessee
Coordinates35.99837, -89.54588
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length90 ft (27.3 m)
Longest span81 ft (24.8 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic64 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed61.5 mi (99 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$611,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A623 over Slough Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Nfa A623 over Slough 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 October 2023.

How much traffic does Nfa A623 over Slough Creek carry?

About 40 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A623 over Slough Creek?

The structure is 90 ft (27.3 m) long with a longest span of 81 ft (24.8 m) and a deck 21 ft wide.

Who owns Nfa A623 over Slough Creek?

It is owned by the County Highway Agency.