Sites may remain in buried deposits along the banks of the Cooks River and Sheas Creek/Alexandra Canal where extensive construction works have taken place since the early 1800s.

Analysis of shell deposit at the QANTEK site, located between Tempe House, the Cooks River and the Princess Highway revealed the species Anadara trapezia, Phyrazus ebenieus, Austrocochlea constricta, Ostrea sp and Polinices sp. Although it could not be determined whether the shells were naturally deposited or the remains of Aboriginal meals, the relatively high proportion of juveniles and the high number of articulated bivalves among the shells suggest it is more likely to be naturally deposited shell.

The QANTEK site shows that there is undisturbed sediments below post 1788 fill. It is possible that archaeological material remains in some of these undisturbed deposits along the Cooks River.