Strike Force Rosann detectives will on Friday (November 19) drain a creek at the search site on the NSW Mid North Coast in the ongoing search for William Tyrrell's remains.
Detectives are being assisted by NSW Rural Fire Service (RFS) volunteers, with the process at the site on on Cobb and Co Rd/Batar Creek Rd, Kendall, expected to take around three hours.
Police continue to sift through soil at the search site one kilometre from the former home of William's late foster grandmother on Benaroon Drive at Kendall.
What has happened so far:
Tarps and protective coverings have also been placed on the dig site where items were discovered on Wednesday afternoon.
Detectives are awaiting forensic testing of the items and no further digging at this site will continue until the results are released.
William Tyrrell, the little boy in the Spiderman suit, went missing on September 12, 2014 while he was playing outside his foster grandmother's house. He has not been seen since.
The seven-year investigation into his disappearance has returned to that location where Strike Force investigators are zeroing in on three key sites including the balcony and gardens at the home.
On Thursday, Australian Federal Police officers brought in ground penetrating radar to scan a concrete slab at the Kendall property. The slab was laid after William's disappearance.
It comes after police investigated theories he may have fallen from a balcony at the property.
Earlier this week police also seized a Mazda that previously belonged to the foster grandmother, who has since died.
Cadaver dogs have also been on the scene.
Sign up for our newsletter to stay up to date.