A marine licence was issued by Natural Resources Wales (NRW) to dispose of dredged material to the Cardiff Grounds disposal site in 2014, which is one of 17 disposal sites across Wales.
Cafodd trwydded forol ei rhoi yn 2014 gan Gyfoeth Naturiol Cymru (CNC) ar gyfer cael gwared ar ddeunydd wedi'i garthu ar safle gwaredu Cardiff Grounds, sef un o'r 17 safle gwaredu yng Nghymru.