US Bridges

Nfa A489 over Maxwell Branch

Good

Sumner County, Tennessee · 2.1 MI NE JCT SR25&SR76 · Structure no. 830A4890001

Built
1965
60 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
150
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A489 over Maxwell Branch is a concrete continuous culvert carrying Nfa A489 over Maxwell Branch in Sumner County, Tennessee. It was built in 1965, so it is 60 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 240 by 2041. The structure is 24 ft (7.3 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNfa A489
CrossesMaxwell Branch
Location2.1 MI NE JCT SR25&SR76
RouteCounty Highway 0A489
Coordinates36.52248, -86.59936
Functional classRural Local

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating39.2 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width23 ft (6.9 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic240 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$91,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A489 over Maxwell Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Nfa A489 over Maxwell 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 October 2024.

How much traffic does Nfa A489 over Maxwell Branch carry?

About 150 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A489 over Maxwell Branch?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 23 ft wide.

Who owns Nfa A489 over Maxwell Branch?

It is owned by the County Highway Agency.