sentences:  The main part of the parish belonged to the county of Buskerud, while the annex "Strømmen" belonged to the county of Vestfold.The border between the two counties followed the fjord of Drammensfjord.The town of Svelvik was separated from Strømm as a municipality of its own in 1845 - but these two municipalities were again merged to one January 1, 1964.