Detectives said today's search is unrelated to him but renewed their appeal for the man to come forward, according to RTE. This followed weeks during which they assessed "credible information" provided by a source, who told gardai the missing man's remains are buried at the three-acre site, owned by South Dublin county council.
Mr Deely was last seen on the morning of December 8, 2000, in the Haddington Road area of the city centre.
It is understood the information was passed to investigating detectives at Pearse Street Garda Station by a close associate of a Dublin criminal in recent months.
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The alleged suspect, who can not be named for legal reasons, is a well-known criminal who has been involved in various forms of criminality over decades.
The file on Trevor has never been closed, and there have been a number of appeals for information over the year.
Speaking at the scene, he said: "The reason for this is because we are conducting a search of this area over the coming days, searching for evidence connected to the disappearance of Trevor Deely".
Five killed in J&K gunfight
Nuclear-armed rivals India and Pakistan each administer part of Kashmir, but both claim the Himalayan territory in its entirety. Militants fired at the approaching security personnel, wounding five Army personnel, two of whom later died.
The Deely family have been informed of the latest developments in the investigation.
A garda dog unit is assisting in the search which is being guided by a forensic archaeologist.
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The Belgium global doubled the lead after half-time, glancing in a header from Henrikh Mkhitaryan's inswinging free-kick. I think we can do better than last season'.