US Bridges

Nfa 2500 (sa 4522) over Koontz Creek

Fair

Jefferson County, Tennessee · Btwn US70 & I40-I81 JCT · Structure no. 45025000001

Built
1950
75 years old, rebuilt 2020
Condition
Fair
inspected May 2023
Type
Arch - Deck
Concrete
Length
31 ft
1 main span
Daily traffic
628
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2500 (sa 4522) over Koontz Creek is a concrete arch - deck carrying Nfa 2500 (sa 4522) over Koontz Creek in Jefferson County, Tennessee. It was built in 1950 and reconstructed in 2020, so it is 75 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 628 vehicles a day, roughly 3% of them trucks, projected to reach 917 by 2041. The structure is 31 ft (9.6 m) long and 48 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 2500 (sa 4522)
CrossesKoontz Creek
LocationBtwn US70 & I40-I81 JCT
RouteCounty Highway 2500
CountyJefferson County
StateTennessee
Coordinates36.05038, -83.38533
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length31 ft (9.6 m)
Longest span27 ft (8.2 m)
Deck width48 ft (14.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic628 (2021)
Projected traffic917 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$730,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2500 (sa 4522) over Koontz Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2020.

What condition is Nfa 2500 (sa 4522) over Koontz 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 May 2023.

How much traffic does Nfa 2500 (sa 4522) over Koontz Creek carry?

About 628 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2500 (sa 4522) over Koontz Creek?

The structure is 31 ft (9.6 m) long with a longest span of 27 ft (8.2 m) and a deck 48 ft wide.

Who owns Nfa 2500 (sa 4522) over Koontz Creek?

It is owned by the County Highway Agency.