US Bridges

Nfa A056 (sa 8610) over Granny Lewis Creek

GoodPosted for load

Unicoi County, Tennessee · Near Temple Hill School · Structure no. 860A0560001

Built
1978
47 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
250
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A056 (sa 8610) over Granny Lewis Creek is a steel stringer/multi-beam or girder carrying Nfa A056 (sa 8610) over Granny Lewis Creek in Unicoi 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 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. Its operating status is: posted for load restriction.

It carries about 250 vehicles a day, roughly 6% of them trucks, projected to reach 400 by 2042. The structure is 27 ft (8.3 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNfa A056 (sa 8610)
CrossesGranny Lewis Creek
LocationNear Temple Hill School
RouteCounty Highway 56
CountyUnicoi County
StateTennessee
Coordinates36.0874, -82.4851
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length27 ft (8.3 m)
Longest span24 ft (7.4 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic400 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$109,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A056 (sa 8610) over Granny Lewis Creek built?

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

What condition is Nfa A056 (sa 8610) over Granny Lewis 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 July 2024.

How much traffic does Nfa A056 (sa 8610) over Granny Lewis Creek carry?

About 250 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa A056 (sa 8610) over Granny Lewis Creek?

The structure is 27 ft (8.3 m) long with a longest span of 24 ft (7.4 m) and a deck 22 ft wide.

Who owns Nfa A056 (sa 8610) over Granny Lewis Creek?

It is owned by the County Highway Agency.