US Bridges

Nfa A297 (sa 4625) over Forge Creek

Good

Johnson County, Tennessee · Old Forge CR Rd-S 1SR167 · Structure no. 460A2970003

Built
2015
10 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
40 ft
2 main spans
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A297 (sa 4625) over Forge Creek is a steel culvert carrying Nfa A297 (sa 4625) over Forge Creek in Johnson County, Tennessee. It was built in 2015, so it is 10 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 100 vehicles a day, roughly 2% of them trucks, projected to reach 160 by 2042. The structure is 40 ft (12.1 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A297 (sa 4625)
CrossesForge Creek
LocationOld Forge CR Rd-S 1SR167
RouteCounty Highway 297
CountyJohnson County
StateTennessee
Coordinates36.45144, -81.75977
Functional classRural Local

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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length40 ft (12.1 m)
Longest span18 ft (5.5 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic160 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 A297 (sa 4625) over Forge Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is Nfa A297 (sa 4625) over Forge 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 April 2024.

How much traffic does Nfa A297 (sa 4625) over Forge Creek carry?

About 100 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A297 (sa 4625) over Forge Creek?

The structure is 40 ft (12.1 m) long with a longest span of 18 ft (5.5 m) and a deck 30 ft wide.

Who owns Nfa A297 (sa 4625) over Forge Creek?

It is owned by the County Highway Agency.