US Bridges

I75 over Blue Springs Branch

Fair

McMinn County, Tennessee · At SR 30 Intersection · Structure no. 54I00750021

Built
1971
54 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
30 ft
3 main spans
Daily traffic
41,537
2021 count
Owner
State
State Highway Agency

About this bridge

I75 over Blue Springs Branch is a concrete continuous culvert carrying I75 over Blue Springs Branch in McMinn County, Tennessee. It was built in 1971, so it is 54 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 41,537 vehicles a day, roughly 7% of them trucks, projected to reach 70,928 by 2040. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI75
CrossesBlue Springs Branch
LocationAt SR 30 Intersection
RouteInterstate 75
CountyMcMinn County
StateTennessee
Coordinates35.46629, -84.64839
Functional classUrban 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 adequacy8: Equal to present desirable 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 spans3
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,537 (2021)
Projected traffic70,928 by 2040
Trucks7%
Lanes on structure4
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$463,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I75 over Blue Springs Branch built?

It was built in 1971, making it 54 years old in 2025.

What condition is I75 over Blue Springs 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 over Blue Springs Branch carry?

About 41,537 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I75 over Blue Springs Branch?

The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m).

Who owns I75 over Blue Springs Branch?

It is owned by the State Highway Agency.