US Bridges

Nfa A302 over Forge Creek

Poor

Johnson County, Tennessee · S of SR167 E of Mtn City · Structure no. 460A2970005

Built
1978
47 years old
Condition
Poor
inspected April 2024
Type
Slab
Concrete
Length
47 ft
2 main spans
Daily traffic
70
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A302 over Forge Creek is a concrete slab carrying Nfa A302 over Forge 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 70 vehicles a day, roughly 6% of them trucks, projected to reach 112 by 2042. The structure is 47 ft (14.3 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A302
CrossesForge Creek
LocationS of SR167 E of Mtn City
RouteCounty Highway 302
CountyJohnson County
StateTennessee
Coordinates36.45426, -81.75518
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length47 ft (14.3 m)
Longest span21 ft (6.4 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2020)
Projected traffic112 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$305,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A302 over Forge Creek built?

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

What condition is Nfa A302 over Forge Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Nfa A302 over Forge Creek carry?

About 70 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa A302 over Forge Creek?

The structure is 47 ft (14.3 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Nfa A302 over Forge Creek?

It is owned by the County Highway Agency.