"It was fate what happened today,” said Powell, who played for City in the 1980s before returning as manager in 2007.
"Llanelli lost and we leave here top of the league and as champions - Farrar Road deserves that.
"I spent nine to 10 years here as a player, played against Atletico Madrid, then 20 years on I return as a manager and win the league.
"It’s been hard to take in at times and I’m a privileged man to have been part of this great football ground."
Farrar Road will now become the site for a new Asda supermarket while the club moves to Nantporth on the outskirts of the city.
A range of activities was organised to mark the occasion with many former players invited as guests of the club.
Phil Stead was among the photographers on hand to record some special memories of the final day at the ground and his images can be viewed on the award-winning Ffwtbol blog.
• The attendance of 2,593 at Farrar Road was the third-highest in the history of the Welsh Premier League, bettered only by the 2,746 who watched Barry Town host Caernarfon on 26 January 1997 and a crowd of 2,741 at Belle Vue in April 2004 when Rhyl hosted Total Network Solutions.
Bangor City averaged gates of 484 during their 19 and a half domestic league seasons at the stadium.