Mapping Florida’s Sinkholes, Understanding the Sinkhole Threat
Sinkholes can form anywhere in Florida, but the highest activity level occurs in west central Florida because of the karst limestone environment. There are several influences that increase the risk of sinkhole activity such as long-term weather conditions, heavy acidic rains, and drought-like conditions.
The regional map on the right depicts sinkhole locations that have been reported since 1954 by the Florida Geological Survey Series No. 110. It does not show all sinkhole activity in Florida, but you can get a generalization of how widespread this problem is.
There are four sinkhole zones in Florida:
- Zone 1 (Yellow): This region consists of exposed or thinly-covered carbonate rocks. Broad and shallow sinkholes are common in this area. Cities in the zone 1 region include: Miami, Coral Springs, Hialeah, Hollywood, Live Oak, Miramar, and Pembroke Pines.
- Zone 2 (Green): This region has permeable sand that varies in thickness from 20 to 200 feet. It mainly consists of small cover subsidence. Zone 2 cities include: Fort Lauderdale, Brooksville, Cape Coral, Port St. Lucie, and Orlando.
- Zone 3 (Blue): Zone 3 has cohesive, low-permeable soil that forms abrupt collapse sinkholes. Cities in zone 3 include: Tampa, Tallahassee, Gainesville, Ocala, and St. Petersburg.
- Zone 4 (Pink): This region consists of deeply inter-bedded carbonate rocks and cohesive clayey sands. Sinkholes are uncommon in this region, but collapse and small subsidence sinkholes can occur in shallow beds. Cities located in zone 4 include Jacksonville and St. Augustine.
It is important to know what zone you live in so you can be aware of sinkhole activity on your property. Sinkhole formation has accelerated over the years. They are commonly created by extended droughts, heavy rainfall, land development, water pumping, and construction of retention ponds.
Sinkholes can range in size from large to small. Some are large enough to swallow homes, roads, swimming pools, and buildings. They cause significant structural damage to homes and buildings, forming underneath foundations or yards.
Not only does sinkhole activity destroy structures, they also pose a environmental concern. The carbonate rocks, which are present in sinkhole formation, provide direct access to all types of pollutants such as fertilizers and pesticides. Oil and gasoline also channel directly into the sinkhole. Despite all the problems sinkholes produce, they are a natural part of the ecosystem. For more information about sinkholes in the Florida region, contact Foundation Pros of Florida.
Know the Common Signs of Sinkholes in Florida
As a homeowner or business owner, it is important to know the common signs of sinkholes in Florida. Most sinkholes give early warning signs before they create become a serious threat. Look for the common signs of sinkhole activity such as:
- Cracks in windows, doors, and interior joint areas
- Cracks in stucco or exterior block
- Sticking windows and doors that are hard to open and close
- Yard or street depressions
- Separations, cracks and gaps in concrete
- Wilting plants
- Neighbors with sinkholes
- Actual cavity forming
- Foundation cracks
- Settling foundation
- Sloping floors
- Ceiling cracks
- Loss of pool water
If you notice any of these signs, give us a call immediately. We offer sinkhole repair for the residents of Florida. Our services include compaction grouting and void filling.
- Compaction grouting: This is designed to stabilize loose soil. It is a fast settling method that uses polyurethane foam that is injected into loose soil. As the foam expands, it compacts the soil.
- Void filling: This is another sinkhole repair method. It involves filling up spaces and gaps underneath the concrete. We use a high density, lightweight material called polyurethane. It is injected into drilled holes. It expands as a foam, covering the area in seconds.
Our sinkhole repair products are made by Earth Contact Products (ECP), the leading manufacturer in foundation repair and waterproofing. You’re getting the latest products on the market with excellent service from our professionals. Foundation Professionals of Florida has the skills and experience for all of sinkhole repair needs. Our technique will support and stabilize the soil on your property to give you extra protection against sinkhole activity in the Florida area. Contact us today if you need an estimate.