US Bridges

Nfa 2490 (sa 7810) over Knob Creek

Fair

Sevier County, Tennessee · N of US441-W of Seviervil · Structure no. 78024900001

Built
2014
11 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
2,220
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2490 (sa 7810) over Knob Creek is a concrete continuous culvert carrying Nfa 2490 (sa 7810) over Knob Creek in Sevier County, Tennessee. It was built in 2014, so it is 11 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 2,220 vehicles a day, roughly 3% of them trucks, projected to reach 2,954 by 2041. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNfa 2490 (sa 7810)
CrossesKnob Creek
LocationN of US441-W of Seviervil
RouteCounty Highway 2490
CountySevier County
StateTennessee
Coordinates35.86747, -83.66047
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span13 ft (4 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,220 (2021)
Projected traffic2,954 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2490 (sa 7810) over Knob Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Nfa 2490 (sa 7810) over Knob 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 July 2023.

How much traffic does Nfa 2490 (sa 7810) over Knob Creek carry?

About 2,220 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2490 (sa 7810) over Knob Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4 m) and a deck 25 ft wide.

Who owns Nfa 2490 (sa 7810) over Knob Creek?

It is owned by the County Highway Agency.