Sigdal - land of the Stoverns!

We tracked down the town grandpa Stovern was born in - Holmestrand.  Then headed to the Sigdal region where the Stovern farms were from.  Tried and tried, but never could find actual farm.  Got onto the road the farm was on, but could never could find farm.  This waterfall powered a cobalt mine years ago that was the source of industry in the region.  Was great grandpa a miner?