US Bridges

Nfa 2473 (sa 2910) over Rocky Creek

Good

Grainger County, Tennessee · East of SR1 · Structure no. 29024730003

Built
1923
102 years old
Condition
Good
inspected April 2023
Type
Arch - Deck
Concrete
Length
22 ft
1 main span
Daily traffic
931
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2473 (sa 2910) over Rocky Creek is a concrete arch - deck carrying Nfa 2473 (sa 2910) over Rocky Creek in Grainger County, Tennessee. It was built in 1923, so it is 102 years old, older 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 931 vehicles a day, roughly 3% of them trucks, projected to reach 1,333 by 2041. The structure is 22 ft (6.7 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNfa 2473 (sa 2910)
CrossesRocky Creek
LocationEast of SR1
RouteCounty Highway 2473
Coordinates36.28962, -83.48219
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span22 ft (6.6 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic931 (2021)
Projected traffic1,333 by 2041
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$134,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2473 (sa 2910) over Rocky Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is Nfa 2473 (sa 2910) over Rocky 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 2023.

How much traffic does Nfa 2473 (sa 2910) over Rocky Creek carry?

About 931 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2473 (sa 2910) over Rocky Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.6 m) and a deck 18 ft wide.

Who owns Nfa 2473 (sa 2910) over Rocky Creek?

It is owned by the County Highway Agency.