The search for four-year-old August ‘Gus’ Lamont has entered its second month with police confirming a dam on his family’s remote South Australian sheep station had been drained — but no trace of the missing boy was found.

Gus vanished from Oak Park Station, about 40km south of Yunta in SA’s Mid North, on September 27.

Despite one of the largest search operations in the state’s history, the boy remains missing.

The dam — located roughly 600m from the homestead and previously searched by divers — was emptied to allow for a clearer sweep of the waterway and its vegetation.

South Australia Police said the move was aimed at “ruling out the possibility the boy may have drowned”.

The operation to drain the main dam into the southern dam commenced at 9.15am on Friday.

Experts pumped water

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