The Port Augusta City Council has run into strife after attempting to remove 500 shopping trolleys from beneath the Port Augusta wharf.

Retailers originally agreed to pay 90% of the removal costs, with the project estimated to cost $15,000. However, that cost has almost tripled due to delays caused by the weather, and a crane fault, forcing the council to ask for more money.

Some of the piles of trolleys are over six metres tall and pose a serious hazard to anyone who jumps or falls into the water.