US Bridges

Nfa A305 over North Indian Creek

Good

Unicoi County, Tennessee · W of SR36-S of Unicoi · Structure no. 860A3050001

Built
1996
29 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A305 over North Indian Creek is a prestressed concrete box beam or girders - single or spread carrying Nfa A305 over North Indian Creek in Unicoi County, Tennessee. It was built in 1996, so it is 29 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 6% of them trucks, projected to reach 16 by 2040. The structure is 45 ft (13.7 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa A305
CrossesNorth Indian Creek
LocationW of SR36-S of Unicoi
RouteCounty Highway 305
Coordinates36.18887, -82.37693
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span41 ft (12.5 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic16 by 2040
Trucks6%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A305 over North Indian Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Nfa A305 over North Indian 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 A305 over North Indian Creek carry?

About 10 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa A305 over North Indian Creek?

The structure is 45 ft (13.7 m) long with a longest span of 41 ft (12.5 m) and a deck 24 ft wide.

Who owns Nfa A305 over North Indian Creek?

It is owned by the County Highway Agency.