Sinkhole urban areas due to water main breaks or sewer collapses when old pipes give way. They can also occur from the overpumping and extraction of groundwater and subsurface fluids. Sinkholes can also form when natural water-drainage patterns are changed and new water-diversion systems are developed. Some sinkholes form when the land surface is changed, such as when industrial and runoff-storage ponds are created; the substantial weight of the new material can trigger a collapse of the roof of an existing void or cavity in the subsurface, resulting in development of a sinkhole. Sinkholes tend to occur in karst landscapes. Karst
A Countess Below Stairs Anna finds him after she flees Muriel's ball, Rupert sees her crying on Sergei's shoulder and assumes that they plan to marry. A Countess Below Stairs A Countess Below Stairs is a 1981 British historical romance novel by Eva Ibbotson. It follows the story of Anna Grazinsky, a Russian countess, after World War I. It has also been published under the title The Secret Countess as a young adult novel. Anna is a charming child who sees the good in everything and everyone: her cousin Sergei, her younger brother Petya, and all of her multiple governesses. She has lived her