Officer MADELEINE McCann was spotted carrying several bags out of the search area.
German and Portuguese police investigate Catholicism B yesterday began a search for the desolate site 45 minutes from Praia da Luz, where Maddie disappeared in 2007.
German investigators suspect Christian B is said to have requested a search after discovering new leads.
Video taken this afternoon shows officers digging at the search site with shovels.
Excavations began at around 11 a.m. local time and were carried out at two different locations.
And some bags were removed from the search area this afternoon, according to the BBC.
The Arade Dam can only be accessed by a dirt road and has been linked to the Maddie case previously and was searched in 2008.
That is the location of a few days after she disappeared along with a woman who was handing a child matching her description to a mysterious man.
The evidence leading up to the new search is unknown – but sources say Christian B once called the dam his “little paradise”.
He is said to be “frequently seen there” and sometimes spends the night in the barren area near a derelict hilltop eatery.
And the reservoir is in between where he will park his shack camper van in Praia da Luz and a villa he will stay in at Foral.
A search for the dam in 2008 turned up a 17-foot rope, duct tape and small bones – but none of this was ever firmly linked to the case.
Portuguese broadcaster SIC reported that German police had asked permission to search the dam in a formal judicial request sent to Portugal after concluding it was an “area of interest”.
It said: “Investigators know suspect Christian B regularly visits this dam.
“He calls it his little paradise and often spends the night here. One sees him here often.
“The German authorities considered the reservoir an area of interest and ended up sending a letter of request or an international request.”
The reservoir was searched twice in February and March 2008 by divers hired by a Portuguese lawyer.
Marcos Aragao Correia organized the privately funded operation after claiming he had received “underworld” tips.
He claimed that he had been told by underworld contacts that Madeleine had been murdered and that her body was thrown into the reservoir within 48 hours of her disappearance.
Madeleines Gerry and Kate McCann’s parents had previously dismissed Mr Correia as self-proclaimed and said there was no evidence to suggest any link between their daughter and the reservoir.