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Sinkholes in Lee County, FL | Florida Sinkholes

Lee County, FL Sinkhole Map

Sinkhole Count: 5

Lee County, FL FAQs

Lee County, FL

Lee County is located in the Southwest Florida region where the coastal areas teem with coveted residential communities. This county was established in 1887 and named after the general of Confederate Army, Robert E. Lee.

Water resources notably constitute over one-third of this county’s total area of 1,212 square meters. Prominent within its territory is the extensive stretch of the Caloosahatchee River as it empties into the Gulf of Mexico.

Fort Myers, which grew from one of the first U.S. military encampments during the 1830s American Indian Wars, is the seat of Lee County.  This county’s largest city is Cape Coral which was established in 1957 as a planned community within 120 square miles and turned out as the largest city between Tampa and Miami. The Metropolitan Statistical Area of Cape Coral–Fort Myers is also one of the Sunshine State’s largest.

Beach lovers’ haven

Prospective home buyers as well as tourists flock to Lee County, with its magnet of more than 50 miles of pristine white beaches stretching from the north in Boca Grande to Bonita Springs in the south. The most family-friendly among the county’s beaches could be found on Estero Island which has a gently sloping shoreline, thus giving this island the reputation of having the world’s safest beaches.

As many events that shaped Florida occurred in Lee County, it is also noted for several historical sites including many vintage residences. The county likewise offers exciting family adventures, such as those offered at the Calusa Nature Center and Planetarium in Fort Myers. Besides nature trails, its attractions include a freshwater aquarium, live-reptile exhibits, and a natural history museum plus a kid’s delight in star and laser-light shows at the planetarium.

For vintage homes, Fort Myers’ points of interest feature the winter retreats of Thomas Edison and Henry Ford. The city’s historic downtown waterfront has been renovated extensively, featuring new restaurants, nightclubs, arts and culture centers, and residential units. Notable venues for cultural events in the city include the riverside Centennial Park and the Yacht Basin.

Water-based pleasures

Water elements form an essential element too of living in Cape Coral. This city boasts of 400 miles of canals meandering around residential communities, waterways that far exceeds those found in Venice, Italy. Leisure activities that Cape Coral offers include not only boating and fishing but also golf and tennis.

Cape Coral is host to several commercial and manufacturing sites which has drawn many locators as a result of Lee County’s favorable business climate and reasonable labor costs. The county is a favored business destination owing also to its talented workforce and the high quality of life in its residential communities.

A vibrant lifestyle is likewise evident in Lee County’s Bonita Springs. Tucked between Naples and Fort Myers, this city flaunts master-planned, award-winning golf communities and waterfront residential developments. Its economic growth is humming smoothly too, thanks to the city’s commercial parks and business districts which all contribute to the superb quality of life in Lee County.

References

Lee County

Lee Government

Fort  Myers

Cape  Coral

FORT MYERS, FL
June 2017 – A sinkhole appeared at the corner of Tournament Street and McGregor Boulevard near downtown

CAPE CORAL, FL
August 2017 – A sinkhole has been reported at Mohawk and 58th Pl. in Cape Coral.

FORT MYERS, FL
October 2017 – A sinkhole opened near a manhole on Winkler Road between College Parkway and McGregor Boulevard.

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Sinkholes in Lee County, FL

Southwest Florida’s unique geology makes it prone to sinkholes, like in Lee County. The area sits on porous limestone bedrock, shaped by acidic groundwater over thousands of years. This karst terrain, as shown in the Florida Geological Survey’s 2008 data, highlights the risk in some communities.

State geologists divide sinkholes into three types based on the FDEP system. Recent studies found 23 communities in Lee County with different risk levels. Fort Myers Shores is at high risk because of its shallow bedrock.

Most sinkholes are caused by limestone dissolving naturally. But, 17% are caused by other factors like broken pipes or soil compaction. The Florida Geological Survey advises checking for ground shifts with experts. They note that sinkhole activity often follows droughts and changes in the water table.

Using geospatial technology, experts keep an eye on sinkhole risks. They focus on eastern Lee County, where old neighborhoods meet active karst systems. This method helps plan land use and keeps the public informed about Florida’s changing geology.

Recent & Notable Sinkhole Incidents / Case Studies

Lee County has seen 14 big sinkhole events from 2008 to now. Most of these, 78%, are linked to changes in groundwater levels. The 2015 Fort Myers Shores sinkhole is a key example. It made a 32-foot-wide hole and damaged the road.

It took 11 weeks and $287,000 to fix the area, the Florida Geological Survey (FGS) found.

In 2020, three homes in Lochmoor Waterway Estates were damaged by a 19-foot-deep sinkhole. This happened during a dry season. The damage cost over $1.2 million to fix, needing special grouting.

Year Depth (ft) Repair Costs Primary Trigger
2015 15 $287,000 Aquifer depletion
2020 19 $420,000 Drought conditions
2017 22 $189,000 Water main rupture

FGS data shows sinkholes are more common when we take more water from the ground. Drought years, like 2011, 2017, and 2021, had 22% more sinkholes than usual. Also, 15% of sinkholes were caused by damaged infrastructure, like a 2008 event in Lehigh Acres.

Key patterns in Lee County sinkhole data are:

  • 84% of incidents happened where limestone is less than 30 feet deep
  • Repair costs went up 41% from 2008 to 2023
  • 63% of claims were for homes built before 1990

FDEP monitoring stations found groundwater levels changed more in sinkhole areas. This helps planners and insurance companies understand the risks better.

Risk Factors & What Homeowners Should Do

Properties in Lee County FL face higher sinkhole risks due to four key factors. Buildings near active quarries have a 37% higher risk. The type of soil, like clay, affects stability.

Changes in the water table can also cause erosion. Foundations built directly on the ground are more at risk than those on pilings.

The Florida Geological Survey has rules for suspected sinkholes. Homeowners must watch for 72 hours and use approved fill materials. Contractors need to follow specific plans before starting repairs.

Florida Statute 627.706 requires insurance for certain sinkhole damage. This includes damage that makes a home uninhabitable. But, policies don’t cover small cracks or settling.

State laws protect buyers. Sellers must tell about sinkhole activity using a specific form. Not doing so can lead to legal trouble. Geological surveys are good for seven years unless there are changes.

Regular checks can help prevent problems. Homeowners near limestone should get their foundations checked every year. The Lee County Building Division offers free soil reports. Catching issues early can save money and prevent bigger problems.

FAQ

Why is Lee County particularily prone to sinkhole formation?

Lee County’s karst topography has porous limestone bedrock. Acidic groundwater has dissolved it over time, creating voids. Florida Geological Survey data shows 83% of subsidence incidents happen where bedrock is ≤30ft below ground. This is common in Fort Myers Shores and Suncoast Estates.

What were the most significant sinkhole events in recent Lee County history?

The 2015 Fort Myers Shores collapse was significant. It had a 32ft diameter and 15ft depth, costing 7k to repair. In 2020, three homes in Lochmoor Waterway Estates were affected. FDEP records show 14 major incidents between 2008-2023, with costs ranging from k to 0k.

How do drought conditions impact sinkhole risks in Lee County?

Droughts increase sinkhole frequency by 22%, according to FGS and FDEP data. Groundwater table changes over 3ft can destabilize structures. This is more likely in areas with clay layers thinner than 15ft.

What emergency protocols should residents follow during sinkhole formation?

Florida Geological Survey requires immediate evacuation of affected structures. A 72-hour observation period follows. DEP-approved fill materials like washed limestone aggregate are used. Professionals must assess stabilization before reconstruction starts.

How does Florida Statute 627.706 affect sinkhole insurance coverage?

Policies must cover “catastrophic ground cover collapse” if it meets specific criteria. This includes structural damage making homes uninhabitable, foundation failure, and government condemnation orders. Standard policies exclude non-catastrophic sinkhole damage without supplemental coverage.

What sinkhole disclosure requirements exist for Lee County real estate transactions?

Florida Real Estate Commission Rule 61J2-4.014 requires full disclosure of verified sinkhole activity within 500ft of properties. Sellers must provide repair documentation and geological assessment reports from licensed engineers.

How does proximity to quarries influence sinkhole risks?

FDEP data shows properties within 2 miles of active quarries have 37% higher sinkhole likelihood. This is due to altered groundwater patterns and subsurface stress from mining operations.
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