Just skipping pages here (sorry guys) but the article/re -post (?) of The Mirror seems more detailed about the wells and the search:
Madeleine McCann cops pictured searching three wells as parents cling to hope
“Kate and Gerry faced an agonising wait after three wells were searched in Vila do Bispo – just a 10-minute drive from the Portuguese resort where the British toddler was snatched.
But the McCanns have still not been told on what grounds the police were acting.
A family source said: “It is a period of prolonged agony. They have still absolutely no idea what evidence police have to
Madeleine is dead.
“They are not being told what police believe happened to her. We feel desperately sorry for them as they’ve endured so much pain and angst for 13 years.”
——
‘
Wells are up to 45ft to bottom
Detectives and divers scoured donkey-driven irrigation systems just a 10-minute drive from Praia da Luz, where Madeleine was snatched in May 2007 days before her fourth birthday.
The search site is also near the beach where prime suspect Christian Brueckner’s VW camper van was photographed in 2007........’
ETA: Had to search what a donkey-driven irrigation was...never heard of that before!