Preparations Clay Ripening pilot in full swing Post date February 7, 2018 Home / News / Preparations Clay Ripening pilot in full swing Preparations for the Clay Ripening pilot project are in full swing. On February 6 2018 we started digging the drainage trenches to remove excess water from the Delfzijl location (NL). ← Additional research pilot Houtribdijk → Building with Nature – the answer to water related challenges is in nature