At nearly 1000 metres over sea level, on the north side of INGAHOGG mountain, the remains of a soapstone quarry have been discovered. It is said, according to the Sagas, that Inga collected the big soapstone that lies in front of the Åkra Church from here.
All in all there are ten known copper mines and two iron mines on the Ølve peninsula. Geologically, the nine mines on Varaldsøy Island also should be figured in. The industry began at Lilledal in 1642 wth the mining of iron ore. From Jernsmauget by Dyråsen, the iron ore was sent to the iron works in eastern Norway.
Close to the tunnel opening at Amalie Skrams vei in Ssandviken, there is a cultural monument of European dimensions; a rope making works that produced rope and fishing tackle for West and North Norway.
Today the name “Verftet” is linked to both a district and conglomeration of buildings lying protected by Fredriksberg castle. The original shipyard was founded in the 1780s by Georg Brunchorst and Georg Vedeler. It was called Gerogenes Verft (the shipyards of the Georgs), and here ships were both built and repaired in the years after 1786.