US Bridges

Nfa D718 over Tuckahoe Creek

Fair

Knox County, Tennessee · Smith Sch Rd-At Midway · Structure no. 470D7180001

Built
1940
85 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
44 ft
1 main span
Daily traffic
120
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa D718 over Tuckahoe Creek is a concrete tee beam carrying Nfa D718 over Tuckahoe Creek in Knox County, Tennessee. It was built in 1940, so it is 85 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 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 120 vehicles a day, roughly 2% of them trucks, projected to reach 192 by 2040. The structure is 44 ft (13.4 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa D718
CrossesTuckahoe Creek
LocationSmith Sch Rd-At Midway
RouteCounty Highway 718
CountyKnox County
StateTennessee
Coordinates35.97135, -83.69337
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span40 ft (12.2 m)
Deck width24 ft (7.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2020)
Projected traffic192 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$137,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa D718 over Tuckahoe Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa D718 over Tuckahoe 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 March 2024.

How much traffic does Nfa D718 over Tuckahoe Creek carry?

About 120 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa D718 over Tuckahoe Creek?

The structure is 44 ft (13.4 m) long with a longest span of 40 ft (12.2 m) and a deck 24 ft wide.

Who owns Nfa D718 over Tuckahoe Creek?

It is owned by the County Highway Agency.