US Bridges

Nfa A421 (sa 8307) over Drakes Creek

Fair

Sumner County, Tennessee · 1.7 MI NW JCT SR174&SR258 · Structure no. 830A4210001

Built
1940
85 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
50 ft
2 main spans
Daily traffic
480
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A421 (sa 8307) over Drakes Creek is a steel continuous stringer/multi-beam or girder carrying Nfa A421 (sa 8307) over Drakes Creek in Sumner County, Tennessee. It was built in 1940, so it is 85 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 480 vehicles a day, roughly 2% of them trucks, projected to reach 768 by 2041. The structure is 50 ft (15.2 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A421 (sa 8307)
CrossesDrakes Creek
Location1.7 MI NW JCT SR174&SR258
RouteCounty Highway 0A421
CountySumner County
StateTennessee
Coordinates36.39245, -86.62607
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
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
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 rating79.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2020)
Projected traffic768 by 2041
Trucks2%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$142,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A421 (sa 8307) over Drakes Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa A421 (sa 8307) over Drakes 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 January 2025.

How much traffic does Nfa A421 (sa 8307) over Drakes Creek carry?

About 480 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A421 (sa 8307) over Drakes Creek?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Nfa A421 (sa 8307) over Drakes Creek?

It is owned by the County Highway Agency.