US Bridges

Nfa 1046 (sa 7533) over Mcknight Branch

Good

Rutherford County, Tennessee · 3.7 MI S JCT SR96&CANNON · Structure no. 75S61890007

Built
1955
70 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
564
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1046 (sa 7533) over Mcknight Branch is a concrete continuous culvert carrying Nfa 1046 (sa 7533) over Mcknight Branch in Rutherford County, Tennessee. It was built in 1955, so it is 70 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 564 vehicles a day, roughly 3% of them trucks, projected to reach 902 by 2042. The structure is 34 ft (10.4 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 1046 (sa 7533)
CrossesMcknight Branch
Location3.7 MI S JCT SR96&CANNON
RouteCounty Highway 1046
CountyRutherford County
StateTennessee
Coordinates35.88449, -86.16016
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic564 (2021)
Projected traffic902 by 2042
Trucks3%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$101,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1046 (sa 7533) over Mcknight Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is Nfa 1046 (sa 7533) over Mcknight 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 September 2024.

How much traffic does Nfa 1046 (sa 7533) over Mcknight Branch carry?

About 564 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1046 (sa 7533) over Mcknight Branch?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns Nfa 1046 (sa 7533) over Mcknight Branch?

It is owned by the County Highway Agency.