US Bridges

Nfa A189 over Sequatchie River

Good

Marion County, Tennessee · 5.5 MI NE JCT SR28&SR150 · Structure no. 580A1890001

Built
1986
39 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
246 ft
4 main spans
Daily traffic
140
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A189 over Sequatchie River is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa A189 over Sequatchie River in Marion County, Tennessee. It was built in 1986, so it is 39 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 140 vehicles a day, roughly 2% of them trucks, projected to reach 224 by 2041. The structure is 246 ft (75 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNfa A189
CrossesSequatchie River
Location5.5 MI NE JCT SR28&SR150
RouteCounty Highway 189
Coordinates35.11063, -85.52655
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length246 ft (75 m)
Longest span62 ft (18.8 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2020)
Projected traffic224 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A189 over Sequatchie River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa A189 over Sequatchie River 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 A189 over Sequatchie River carry?

About 140 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A189 over Sequatchie River?

The structure is 246 ft (75 m) long with a longest span of 62 ft (18.8 m) and a deck 30 ft wide.

Who owns Nfa A189 over Sequatchie River?

It is owned by the County Highway Agency.