US Bridges

Nfa 842 (sa 9408) over Alexander Branch

Good

Williamson County, Tennessee · 1.8 MI NE JCT SR106&SR247 · Structure no. 94S62510007

Built
1960
65 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
2,416
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 842 (sa 9408) over Alexander Branch is a concrete continuous culvert carrying Nfa 842 (sa 9408) over Alexander Branch in Williamson County, Tennessee. It was built in 1960, so it is 65 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 2,416 vehicles a day, roughly 3% of them trucks, projected to reach 3,440 by 2041. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesNfa 842 (sa 9408)
CrossesAlexander Branch
Location1.8 MI NE JCT SR106&SR247
RouteCounty Highway 842
CountyWilliamson County
StateTennessee
Coordinates35.75903, -86.80891
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to 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
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,416 (2021)
Projected traffic3,440 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 842 (sa 9408) over Alexander Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa 842 (sa 9408) over Alexander 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 April 2023.

How much traffic does Nfa 842 (sa 9408) over Alexander Branch carry?

About 2,416 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 842 (sa 9408) over Alexander Branch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Nfa 842 (sa 9408) over Alexander Branch?

It is owned by the County Highway Agency.