US Bridges

Nfa 1223 (sa 7008) over Fourmile Creek

Good

Polk County, Tennessee · In the City of Benton · Structure no. 70S43130007

Built
2018
7 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete
Length
40 ft
2 main spans
Daily traffic
1,403
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa 1223 (sa 7008) over Fourmile Creek is a concrete slab carrying Nfa 1223 (sa 7008) over Fourmile Creek in Polk County, Tennessee. It was built in 2018, so it is 7 years old, younger 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 1,403 vehicles a day, roughly 3% of them trucks, projected to reach 2,080 by 2040. The structure is 40 ft (12.2 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1223 (sa 7008)
CrossesFourmile Creek
LocationIn the City of Benton
RouteCity Street 1223
CountyPolk County
StateTennessee
Coordinates35.17465, -84.65379
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 protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span18 ft (5.5 m)
Deck width41 ft (12.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,403 (2021)
Projected traffic2,080 by 2040
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$680,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1223 (sa 7008) over Fourmile Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Nfa 1223 (sa 7008) over Fourmile 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 June 2024.

How much traffic does Nfa 1223 (sa 7008) over Fourmile Creek carry?

About 1,403 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1223 (sa 7008) over Fourmile Creek?

The structure is 40 ft (12.2 m) long with a longest span of 18 ft (5.5 m) and a deck 41 ft wide.

Who owns Nfa 1223 (sa 7008) over Fourmile Creek?

It is owned by the City or Municipal Highway Agency.