US Bridges

Nfa 1890 over Isbell Branch

Fair

Maury County, Tennessee · 3 M. E. Mt. Pleasant. · Structure no. 600A3180001

Built
1940
85 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
40 ft
1 main span
Daily traffic
556
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1890 over Isbell Branch is a concrete tee beam carrying Nfa 1890 over Isbell Branch in Maury 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 556 vehicles a day, roughly 3% of them trucks, projected to reach 864 by 2040. The structure is 40 ft (12.1 m) long and 17 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 1890
CrossesIsbell Branch
Location3 M. E. Mt. Pleasant.
RouteCounty Highway 1890
CountyMaury County
StateTennessee
Coordinates35.5337, -87.14645
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.1 m)
Longest span38 ft (11.6 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic556 (2021)
Projected traffic864 by 2040
Trucks3%
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 with deck rehabilitation or replacement
Estimated improvement cost$236,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1890 over Isbell Branch built?

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

What condition is Nfa 1890 over Isbell Branch 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 2024.

How much traffic does Nfa 1890 over Isbell Branch carry?

About 556 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1890 over Isbell Branch?

The structure is 40 ft (12.1 m) long with a longest span of 38 ft (11.6 m) and a deck 17 ft wide.

Who owns Nfa 1890 over Isbell Branch?

It is owned by the County Highway Agency.