Reader question: We need some help. We live in Exton and have had sink hole open up in our back yard.. Right now it is pretty big and getting bigger. It opened up after the snow melt off. We had our landscaper fill it, twice. We live in an area that used to be a farm and known for natural springs. Does anyone know what we can do or someone we can call to fix it permanently? We think it runs under our deck at the moment from one side of the yard. We have an 8 year old who loves being outside and the three small dogs. Thanks so much!