After two years of fighting with a failing pond liner, the resident decided to replace the liner in the pond. This 150’ x 115’pond sat above and flowed into a larger pond which was lined with PVC liner. We were replacing this with a 45 mil epdm fishsafe rubber liner. This presented a problem: there is no way to adhere the new rubber liner to the existing PVC liner in the lower pond. The solution was to pour a cement 18” wide x 2’ deep footing next to the wier damn between the two ponds in order to connect the two liners together. The old liner was placed on the top of the footing and a water-block sealant was used. The new rubber liner was placed on top and another layer of sealant along with stainless steel bars were laid atop the two materials in order to press them together to maintain a water-tight junction. A drain tile system was installed beneath the liner to relieve ground water pressure and vent off any gasses. Water tight seals also had to be provided for multiple plumbing penetrations through the liner. Non-woven geotextile planting media bags were used to prevent erosion around the perimeter of the pond. As the pond was landscaped with lawn and perennials, these had to be removed and preserved and maintained throughout the project in order to return them upon completion of the lining. All trenching work and removal of plant material was done by hand in order to maintain the surrounding landscape; great care was taken throughout the project in order to protect existing hard and softscape, so that upon completion, the area appeared almost exactly as it had been before work began. Photo by Larry Carnes