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.
The Post-war Era came to Fana with its population growth and modern sanitary equipment. This had nearly catastrophic consequences for Nordåsvatnet as a recreational area. After the runoff water got re-directed to deeper water, and later also to the fjord outside, Lake Nordås won back both its swimming guests and its sports fishermen.
At Hereiane on warm summer days one you can walk barefoot up the hill from the fjord all the way up to 400 metres elevation. The naked, furrowed bedrock often causes travellers who see it from the north side of the fjord to wonder. Why does it look like this, and why is there so little that grows here? It is a long way to the heavy metal industry in Ålvik and Odda, and there hasn’t been a forest fire in modern times.
Lake Skogseidvatnet is the most famous fishing lake in Hordaland, with good stocks of both char and trout. There is fishing here throughout the year: with a net in the autumn, through the ice in winter, and with a fishing rod in the summer.