US Bridges

I75 Nbl over Branch

Fair

McMinn County, Tennessee · 4.2 MI SW of Monroe CO LN · Structure no. 54I00750045

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
42,243
2021 count
Owner
State
State Highway Agency

About this bridge

I75 Nbl over Branch is a concrete continuous culvert carrying I75 Nbl over Branch in McMinn County, Tennessee. It was built in 1972, so it is 53 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 6 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 42,243 vehicles a day, roughly 6% of them trucks, projected to reach 67,589 by 2042. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI75 Nbl
CrossesBranch
Location4.2 MI SW of Monroe CO LN
RouteInterstate 75
Coordinates35.5446, -84.5692
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,243 (2021)
Projected traffic67,589 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I75 Nbl over Branch built?

It was built in 1972, making it 53 years old in 2025.

What condition is I75 Nbl over 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 April 2024.

How much traffic does I75 Nbl over Branch carry?

About 42,243 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I75 Nbl over Branch?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m).

Who owns I75 Nbl over Branch?

It is owned by the State Highway Agency.