US Bridges

Nfa 2046 (sa 8308) over Brinkley Branch

Good

Sumner County, Tennessee · 3.5 MI NE JCT SR1747SR259 · Structure no. 83020460005

Built
1970
55 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
354
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2046 (sa 8308) over Brinkley Branch is a concrete culvert carrying Nfa 2046 (sa 8308) over Brinkley Branch in Sumner County, Tennessee. It was built in 1970, so it is 55 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 354 vehicles a day, roughly 3% of them trucks, projected to reach 2,256 by 2041. The structure is 23 ft (7 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa 2046 (sa 8308)
CrossesBrinkley Branch
Location3.5 MI NE JCT SR1747SR259
RouteCounty Highway 2046
CountySumner County
StateTennessee
Coordinates36.40975, -86.57523
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length23 ft (7 m)
Longest span14 ft (4.3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic354 (2021)
Projected traffic2,256 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 2046 (sa 8308) over Brinkley Branch built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa 2046 (sa 8308) over Brinkley 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 January 2025.

How much traffic does Nfa 2046 (sa 8308) over Brinkley Branch carry?

About 354 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2046 (sa 8308) over Brinkley Branch?

The structure is 23 ft (7 m) long with a longest span of 14 ft (4.3 m) and a deck 22 ft wide.

Who owns Nfa 2046 (sa 8308) over Brinkley Branch?

It is owned by the County Highway Agency.