US Bridges

Nfa 2617 (sa 4617) over Corn Creek

Fair

Johnson County, Tennessee · N Off US421 at Mtn City · Structure no. 46026170001

Built
1978
47 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
1,886
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2617 (sa 4617) over Corn Creek is a concrete continuous culvert carrying Nfa 2617 (sa 4617) over Corn Creek in Johnson County, Tennessee. It was built in 1978, so it is 47 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 1,886 vehicles a day, roughly 3% of them trucks, projected to reach 3,018 by 2042. The structure is 27 ft (8.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa 2617 (sa 4617)
CrossesCorn Creek
LocationN Off US421 at Mtn City
RouteCounty Highway 2617
CountyJohnson County
StateTennessee
Coordinates36.48995, -81.81118
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,886 (2021)
Projected traffic3,018 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 2617 (sa 4617) over Corn Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Nfa 2617 (sa 4617) over Corn 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 2617 (sa 4617) over Corn Creek carry?

About 1,886 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2617 (sa 4617) over Corn Creek?

The structure is 27 ft (8.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Nfa 2617 (sa 4617) over Corn Creek?

It is owned by the County Highway Agency.