US Bridges

Nfa C860 (sa 7523) over Rock Springs Branch

Good

Rutherford County, Tennessee · 0.9 MI NW of SR41 · Structure no. 75E00720005

Built
1975
50 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete Continuous
Length
49 ft
3 main spans
Daily traffic
1,360
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa C860 (sa 7523) over Rock Springs Branch is a concrete continuous culvert carrying Nfa C860 (sa 7523) over Rock Springs Branch in Rutherford County, Tennessee. It was built in 1975, so it is 50 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 1,360 vehicles a day, roughly 1% of them trucks, projected to reach 2,176 by 2042. The structure is 49 ft (14.9 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa C860 (sa 7523)
CrossesRock Springs Branch
Location0.9 MI NW of SR41
RouteCity Street 0C860
CountyRutherford County
StateTennessee
Coordinates35.96173, -86.57594
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,360 (2020)
Projected traffic2,176 by 2042
Trucks1%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 C860 (sa 7523) over Rock Springs Branch built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa C860 (sa 7523) over Rock Springs Branch 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 C860 (sa 7523) over Rock Springs Branch carry?

About 1,360 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa C860 (sa 7523) over Rock Springs Branch?

The structure is 49 ft (14.9 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns Nfa C860 (sa 7523) over Rock Springs Branch?

It is owned by the City or Municipal Highway Agency.