Subsidence is the movement of the earth’s surface caused by the collapse of underground mine tunnels or shafts. Wherever coal has been mined, underground voids are left behind. Overlying layers of rock and earth naturally tend to sink or shift to fill these voids.
What is coal mine subsidence insurance?
Mine Subsidence Insurance provides financial compensation for losses caused by the movement of the earth’s surface that results from the collapse of underground coal and clay mines in Pennsylvania. This coverage is offered through the Commonwealth of Pennsylvania’s Department of Environmental Protection.
What is subsidence mining?
“Mine Subsidence” means lateral or vertical ground movement caused by a failure initiated at the mine level, of man made underground mines, including, but not limited to coal mines, clay mines, limestone mines, and fluorspar mines that directly damages residences or commercial buildings.
What does mine subsidence look like?
Pit subsidence forms a bell-shaped hole, usually 6-8 feet deep and from 2-40 feet across. The mine will most likely be shallow, less than 100 feet deep, and the bedrock over the mine less than 50 feet thick and consisting of weak rock materials such as shale. Ground movement will be swift and sudden.
Does homeowners insurance cover mine subsidence?
If you live above or near an abandoned mine, it’s important to buy mine subsidence insurance coverage, as a standard homeowners insurance policy will generally exclude damage caused by this event.
Is subsidence covered by insurance?
Most standard buildings insurance policies include cover for damage to your home due to subsidence as long as your home has not had subsidence before. This means you would be covered for the cost of repairs which can be expensive.
Do I need a coal mining search?
A coal search is required if you are buying a property in an area where coal mining used to take place and will identify if there is an environmental or stability risk arising from past, current and future coal mining activity.
How do you fix subsidence?
Subsidence Remedies and Solutions
Remedies may include one or several of the following steps: the removal or cutting back of trees & shrubs. repair of drains. underpinning of the building/structure (as shown above)
What is the main cause of subsidence?
Land subsidence is most often caused by human activities, mainly from the removal of subsurface water. … Here are some other things that can cause land subsidence: aquifer-system compaction, drainage of organic soils, underground mining, hydrocompaction, natural compaction, sinkholes, and thawing permafrost.
Can subsidence be reversed?
If you already own a property suffering from subsidence, the good news is that the problem can be reversed with increasingly sophisticated technology. Halifax home insurance operates its own DNA profiler to identify particular trees causing subsidence.
Should I get mine subsidence insurance?
If your home is located in the general area of underground mining operations, you should give serious consideration to buying mine subsidence insurance. Sag subsidence, the most common type of mine subsidence, appears as a gentle depression in the ground and can spread over an area as large as several acres.
What are mining subsidence in old mines?
Mine subsidence is the settlement of a part of the Earth’s crust due to removal of subsurface solids or underground excavation. Settlements may vary in magnitude from complete collapse or substantial lowering to small distrotions of the ground surface.
How does mining contribute to ground subsidence?
If a fire starts at a previously mined area that has coal pillars left as support structures for the overlying material, the pillars may burn causing a bigger void and subsidence of the overlying material. Coal fires can therefore contribute to the problem of land subsidence in a coal-mining area.
What happens if your house has subsidence?
In a nutshell, subsidence occurs when the ground underneath a property begins to collapse and takes the building’s foundations with it. … However, larger cracks radiating from windows, doorways or corners can indicate that your property’s foundations have begun to sink – especially if they’ve grown over time.
How long does a mining report take?
During busy periods it may take up to 72 hours. If you draw the report boundary yourself, then, in most cases, reports are issued almost instantly.
What does a mining search show?
The Coal Authority Report reveals information regarding any past, present and future mining and highlights any environmental and stability risks which could affect the property. The search also provides details of any subsidence remediation claims, shaft locations, reported hazards and mine gas emissions.