US Bridges

Rockridge Road over Dog Ditch

Fair

Polk County, Florida · 3.2 MI North of US-98 · Structure no. 164140

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

About this bridge

Rockridge Road over Dog Ditch is a prestressed concrete channel beam carrying Rockridge Road over Dog 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 30 ft (9.1 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesRockridge Road
CrossesDog Ditch
Location3.2 MI North of US-98
RouteCounty Highway 0
CountyPolk County
StateFlorida
Coordinates28.23245, -81.97816
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.7 US tons
Inventory rating32.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length30 ft (9.1 m)
Longest span18 ft (5.5 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9 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 Road over Dog Ditch built?

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

What condition is Rockridge Road over Dog 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 Road over Dog Ditch carry?

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

How long is Rockridge Road over Dog Ditch?

The structure is 30 ft (9.1 m) long with a longest span of 18 ft (5.5 m) and a deck 33 ft wide.

Who owns Rockridge Road over Dog Ditch?

It is owned by the County Highway Agency.