Kiiminki TV Mast was originally 323 metres tall and demolished in 1994 as you can see on this video: http://www.yle.fi/elavaarkisto/?s=s&g=4&ag=28&t=14&a=9244 . It was the tallest structure demolished by explosives in Europe until 2009.
Why was it rebuild in 1994 at an other site?
When was the mast, which was demolished in 1994, built?

The description under the video claims that it was expensive to maintain and apparently built in the wrong place, too.