US Bridges

Nfa A078 (sa 3109) over Ranger Creek

Good

Grundy County, Tennessee · 3.5 M SE of Altamont · Structure no. 310A0780001

Built
1984
41 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
290
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A078 (sa 3109) over Ranger Creek is a concrete continuous culvert carrying Nfa A078 (sa 3109) over Ranger Creek in Grundy County, Tennessee. It was built in 1984, so it is 41 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 290 vehicles a day, roughly 2% of them trucks, projected to reach 464 by 2040. The structure is 32 ft (9.7 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNfa A078 (sa 3109)
CrossesRanger Creek
Location3.5 M SE of Altamont
RouteCounty Highway 78
CountyGrundy County
StateTennessee
Coordinates35.40285, -85.66915
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length32 ft (9.7 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2020)
Projected traffic464 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$292,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A078 (sa 3109) over Ranger Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A078 (sa 3109) over Ranger 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 June 2024.

How much traffic does Nfa A078 (sa 3109) over Ranger Creek carry?

About 290 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A078 (sa 3109) over Ranger Creek?

The structure is 32 ft (9.7 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Nfa A078 (sa 3109) over Ranger Creek?

It is owned by the County Highway Agency.