US Bridges

I40 Ll over Nfa C131 Buttermilk RD

Fair

Loudon County, Tennessee · .3 M S Williams Ferry RD · Structure no. 53I00400008

Built
1959
66 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
135 ft
3 main spans
Daily traffic
41,804
2021 count
Owner
State
State Highway Agency

About this bridge

I40 Ll over Nfa C131 Buttermilk RD is a concrete continuous tee beam carrying I40 Ll over Nfa C131 Buttermilk RD in Loudon County, Tennessee. It was built in 1959, so it is 66 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 41,804 vehicles a day, roughly 6% of them trucks, projected to reach 66,886 by 2042. The structure is 135 ft (41.2 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI40 Ll
CrossesNfa C131 Buttermilk RD
Location.3 M S Williams Ferry RD
RouteInterstate 40
CountyLoudon County
StateTennessee
Coordinates35.86882, -84.30058
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.2 m)
Longest span55 ft (16.8 m)
Deck width47 ft (14.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,804 (2021)
Projected traffic66,886 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 Ll over Nfa C131 Buttermilk RD built?

It was built in 1959, making it 66 years old in 2025.

What condition is I40 Ll over Nfa C131 Buttermilk RD 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 October 2024.

How much traffic does I40 Ll over Nfa C131 Buttermilk RD carry?

About 41,804 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I40 Ll over Nfa C131 Buttermilk RD?

The structure is 135 ft (41.2 m) long with a longest span of 55 ft (16.8 m) and a deck 47 ft wide.

Who owns I40 Ll over Nfa C131 Buttermilk RD?

It is owned by the State Highway Agency.