US Bridges

SR-60 over Buttermilk Slough N Fork

Fair

Polk County, Florida · 3.6MI W of River Ranch Bl · Structure no. 160037

Built
1927
98 years old, rebuilt 1951
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
41 ft
2 main spans
Daily traffic
10,600
2024 count
Owner
State
State Highway Agency

About this bridge

SR-60 over Buttermilk Slough N Fork is a concrete slab carrying SR-60 over Buttermilk Slough N Fork in Polk County, Florida. It was built in 1927 and reconstructed in 1951, so it is 98 years old, older than the Florida average of 41.3 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 10,600 vehicles a day, roughly 34% of them trucks, projected to reach 18,391 by 2044. The structure is 41 ft (12.5 m) long and 33 ft wide. If it were closed, the detour would be 90.1 mi (145 km).

CarriesSR-60
CrossesButtermilk Slough N Fork
Location3.6MI W of River Ranch Bl
RouteState Highway 60
StateFlorida
Coordinates27.80572, -81.27842
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length41 ft (12.5 m)
Longest span21 ft (6.3 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,600 (2024)
Projected traffic18,391 by 2044
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed90.1 mi (145 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-60 over Buttermilk Slough N Fork built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1951.

What condition is SR-60 over Buttermilk Slough N Fork 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 August 2024.

How much traffic does SR-60 over Buttermilk Slough N Fork carry?

About 10,600 vehicles per day (2024 count), of which roughly 34% are trucks.

How long is SR-60 over Buttermilk Slough N Fork?

The structure is 41 ft (12.5 m) long with a longest span of 21 ft (6.3 m) and a deck 33 ft wide.

Who owns SR-60 over Buttermilk Slough N Fork?

It is owned by the State Highway Agency.