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Monday – Friday : 9am – 4pm

24/7 Subsidence Monitoring

The world’s first and only sinkhole monitoring system for commercial and residential use.

About Florida’s Subsidence Epidemic

According to the US Geologic Survey, Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater circulating through them. As the rock dissolves, spaces and caverns develop underground. Sinkholes are dramatic because the land usually stays intact for a while until the underground spaces just get too big. If there is not enough support for the land above the spaces, then a sudden collapse of the land surface can occur. These collapses can be small, or, as this picture shows, or they can be huge and can occur where a house or road is on top.

The most damage from sinkholes tends to occur in Florida.

Sinkhole Alley

The Wet Season

Tailored technology, immediate notification.

Implants can deployed near suspect areas of subsidence using standard geotechnical drilling or direct push equipment to depths of 100ft or more.

Sensors are specifically designed to understand potential ground movement of deep unconsolidated soils and provide instant communication to responsible parties.

Our technology has been be deployed to over 20 sites with previously confirmed sinkholes with sensors at optimum depth of choice for early warning of sinkhole activity.

Provides Real-Time Alert capabilities allows you the most flexible configuration while providing the highest level of quality and controlling costs.

Time Domain Reflectometry (TDR), Providing you world-class technology.

We use Time Domain Reflectometry (TDR) to monitor under your home for ground movement. TDR is approved by the Federal Highway Administration and had been used since the 1990s for monitoring ground movement and subsidence.

How it works

  • Sinkhole Alert is installed by trained personal and monitored by experienced electrical engineers.
  • Sinkhole Alert is robust and will last for years.
  • Sinkhole Alert works 24 hours a day, 7 days a week, 365 days a year with a simple internet connection.
  • Sinkhole Alert notifies the homeowner via phone call, text message, and email if there has been movement underground.
  • Inexpensive, remote monitoring by Sinkhole Alert personnel is also available and encouraged.
  • If the alarm triggers, Sinkhole Alert technicians will assess your property free of charge.
  • Read more about TDR here: TDR_primer

FAQ

  • Are there ever false alarms? What happens if it goes off? We haven’t had a false alarm yet. If the alarm triggers, we will visit your property to assess possible ground movement and advise you of your next steps. We do not charge for this assessment, nor do we charge for system adjustments or upgrades. We do charge for repairs caused by the homeowner, such as cutting the wires (this is rare).
  • How long does it take to install the monitoring devices? Installation of the devices takes one day and hookup/calibration takes one day.
  • How will I receive notifications? You can be notified in any way you choose. Text, email, phone call, and an audible alarm on the Sinkhole Alert device are all available. Additionally, for a nominal fee, Sinkhole Alert technicians can also monitor your system.

Meet our team

Sinkhole Alert is a wholly owned subsidiary of The G3 Group, a central Florida-based company that’s been successfully assisting homeowners since 1999.

David Harro, Professional Geologist

Professional Geologist David Harro, a modern day Indiana Jones, has been hunting down sinkholes worldwide for over 20 years. In his spare time you can find him sailing or with his grandchildren.

Tom Nies,

Electrical Engineer

A US Army Veteran, pilot, and all around Mr. Fixit, Tom has over 40 years of experience designing and manufacturing military grade aerospace weapons system test equipment.

Dawn Nies,

Project Coordinator

Currently dual-hatted as a Lieutenant Commander in the US Navy Reserve, Dawn is the engine that keeps the Sinkhole Alert team on target.