"MORE cops than locals" is how the police presence in Roxby Downs has been described by residents ahead of a protest rally at Olympic Dam this weekend.
A blockade remains in place on the Olympic Way - the main throughfare to the BHP Olympic Dam mine - with police checking the creditentials of motorists who try to gain access.
Hundreds of protestors have set up camp about four kilometres from the mine gates.
Spokeswoman for the protestors Nectaria Calan from Friends of the Earth is encouraging locals to engage with their cause.
"Roxby residents are absolutely welcome to come out and have a chat," she said.
The group is opposed to uranium mining.
South Australia police will not reveal how many officers have been deployed to the site except to say numbers are "adequate".
Assistant Commissioner Neil Smith said police would facilitate protestors in reaching the mine's gates and in leaving to gather supplies in town.
Click play below to hear more from Assistant Commissioner Neil Smith.