"We've done what we set out to do," said Blackwell in the Yorkshire Evening Post.
"When we started the season we set our goals and we've achieved the minimum. It's a remarkable achievement when you consider that 15 months ago this club was on its knees.
"We've come back from the brink and we've given ourselves a chance of getting back into the Premier League. I'd like to congratulate the players on coming through a hard season and achieving one of the targets we set them."