US Bridges

Rockridge Rd. over Stone Ditch

Fair

Polk County, Florida · 4.7MI North of US-98 · Structure no. 164142

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Prestressed Concrete
Length
39 ft
2 main spans
Daily traffic
7,000
2023 count
Owner
County
County Highway Agency

About this bridge

Rockridge Rd. over Stone Ditch is a prestressed concrete channel beam carrying Rockridge Rd. over Stone Ditch in Polk County, Florida. It was built in 1960, so it is 65 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 7,000 vehicles a day, roughly 12% of them trucks, projected to reach 12,145 by 2042. The structure is 39 ft (11.9 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesRockridge Rd.
CrossesStone Ditch
Location4.7MI North of US-98
RouteCounty Highway 0
CountyPolk County
StateFlorida
Coordinates28.25145, -81.9659
Functional classRural Local

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.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.4 US tons
Inventory rating36.9 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span21 ft (6.4 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic12,145 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rockridge Rd. over Stone Ditch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Rockridge Rd. over Stone Ditch 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 2023.

How much traffic does Rockridge Rd. over Stone Ditch carry?

About 7,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Rockridge Rd. over Stone Ditch?

The structure is 39 ft (11.9 m) long with a longest span of 21 ft (6.4 m) and a deck 32 ft wide.

Who owns Rockridge Rd. over Stone Ditch?

It is owned by the County Highway Agency.