Thorpe Park No 1 Gravel Pit is a Site of Special Scientific Interest (SSSI) in Surrey, England. The designated SSSI status is as it is a habitat of gadwalls (Anas strepera, a quite large species in the main dabbling duck genus) as a wintering habitat and for the other wildfowl that winter there in small but regular numbers that include goldeneyes (Bucephala clangula) and smews (Mergus albellus).