US Bridges

Nfa 1922 (sa 9402) over Garrison Branch

Good

Williamson County, Tennessee · 7.0 MI NW JCT SR246&MAURY · Structure no. 94019220005

Built
2013
12 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
189
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1922 (sa 9402) over Garrison Branch is a prestressed concrete box beam or girders - single or spread carrying Nfa 1922 (sa 9402) over Garrison Branch in Williamson County, Tennessee. It was built in 2013, so it is 12 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 189 vehicles a day, roughly 3% of them trucks, projected to reach 208 by 2039. The structure is 42 ft (12.8 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesNfa 1922 (sa 9402)
CrossesGarrison Branch
Location7.0 MI NW JCT SR246&MAURY
RouteCounty Highway 1922
Coordinates35.87178, -87.05646
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length42 ft (12.8 m)
Longest span36 ft (11.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2021)
Projected traffic208 by 2039
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 1922 (sa 9402) over Garrison Branch built?

It was built in 2013, making it 12 years old in 2025.

What condition is Nfa 1922 (sa 9402) over Garrison 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 June 2023.

How much traffic does Nfa 1922 (sa 9402) over Garrison Branch carry?

About 189 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1922 (sa 9402) over Garrison Branch?

The structure is 42 ft (12.8 m) long with a longest span of 36 ft (11.1 m) and a deck 26 ft wide.

Who owns Nfa 1922 (sa 9402) over Garrison Branch?

It is owned by the County Highway Agency.