US Bridges

Nfa 974 (sa 9404) over Garrison Creek

Fair

Williamson County, Tennessee · 6.6 MI NW JCT SR246&MAURY · Structure no. 94F00390001

Built
1941
84 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
65 ft
4 main spans
Daily traffic
1,447
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 974 (sa 9404) over Garrison Creek is a concrete continuous culvert carrying Nfa 974 (sa 9404) over Garrison Creek in Williamson County, Tennessee. It was built in 1941, so it is 84 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,447 vehicles a day, roughly 5% of them trucks, projected to reach 1,854 by 2041. The structure is 65 ft (19.8 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 974 (sa 9404)
CrossesGarrison Creek
Location6.6 MI NW JCT SR246&MAURY
RouteCounty Highway 974
CountyWilliamson County
StateTennessee
Coordinates35.87455, -87.0295
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadH 20
Structure length65 ft (19.8 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,447 (2021)
Projected traffic1,854 by 2041
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$509,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 974 (sa 9404) over Garrison Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is Nfa 974 (sa 9404) over Garrison Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Nfa 974 (sa 9404) over Garrison Creek carry?

About 1,447 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Nfa 974 (sa 9404) over Garrison Creek?

The structure is 65 ft (19.8 m) long with a longest span of 15 ft (4.6 m).

Who owns Nfa 974 (sa 9404) over Garrison Creek?

It is owned by the County Highway Agency.