Gardaí investigating the disappearance of Trevor Deely have completed their search operation at the site in Chapelizod.
In a statement, An Garda Síochána said it wished "to thank the public for their patience during the operation."
"Unfortunately nothing that furthers the search for Trevor was located during the search. The site remains closed to the public."
The 22 year old was last seen in December 2000 walking home from his Christmas Party in the Baggot Street area.
A three acre site was sealed off in Chapelizod in August, after officers said new information had come to light.