US Bridges

Nfa D786 over Swan Pond Creek

Fair

Knox County, Tennessee · Holston River Rd-W of 168 · Structure no. 470D7860001

Built
1920
105 years old, rebuilt 1945
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
39 ft
2 main spans
Daily traffic
250
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa D786 over Swan Pond Creek is a concrete continuous culvert carrying Nfa D786 over Swan Pond Creek in Knox County, Tennessee. It was built in 1920 and reconstructed in 1945, so it is 105 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 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 250 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2040. The structure is 39 ft (11.9 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa D786
CrossesSwan Pond Creek
LocationHolston River Rd-W of 168
RouteCounty Highway 786
CountyKnox County
StateTennessee
Coordinates35.98118, -83.83293
Functional classUrban 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
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 inspectionApril 2024
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 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 typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span16 ft (4.9 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic400 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$116,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa D786 over Swan Pond Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1945.

What condition is Nfa D786 over Swan Pond 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 April 2024.

How much traffic does Nfa D786 over Swan Pond Creek carry?

About 250 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa D786 over Swan Pond Creek?

The structure is 39 ft (11.9 m) long with a longest span of 16 ft (4.9 m) and a deck 24 ft wide.

Who owns Nfa D786 over Swan Pond Creek?

It is owned by the County Highway Agency.