US Bridges

Nfa 2490 (sa 7810) over Knob Creek

Good

Sevier County, Tennessee · N of US411-W of Seviervil · Structure no. 78024900003

Built
1984
41 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
26 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 1984, so it is 41 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 2,220 vehicles a day, roughly 3% of them trucks, projected to reach 2,954 by 2041. The structure is 26 ft (7.9 m) long and 30 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 US411-W of Seviervil
RouteCounty Highway 2490
CountySevier County
StateTennessee
Coordinates35.87038, -83.65675
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (8 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 1984, making it 41 years old in 2025.

What condition is Nfa 2490 (sa 7810) over Knob 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 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 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.

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

It is owned by the County Highway Agency.