]> 2026-04-29T18:39:30+00:00 Case study:Dam removal at Grönkullen, River Rolfsån 500 en Approved Barrier removal Bed raising Länsstyrelsen västra Götalands län Municipality of Bollebygds Fenno-Scandian Shield Yes No Yes true Downstreams from the dam(photo. Maria Arola).JPG Part of the old dam (photo. Maria Arola).JPG Removed dam (photo. Maria Arola).JPG Downstreams from the dam(photo. Maria Arola) Part of the old dam (photo. Maria Arola) Removed dam (photo. Maria Arola) No 57.672594335363,12.599088048935 Arolam Andreas Länsstyrelsen västra Götalands län Bäckstrand Barrier removal, Bed raising,,, ,,, 4343 Municipality of Bollebygds Grönkullen stream (photo. Maria Arola) 2005-10-31Z 2453674.5 Channel (photo. Maria Arola).JPG 2002 2452275.5 Complete Grönkullen hydro power station is located in one of the upstream tributaries of River Rolfså, River Sörån. Restorations took place after the county administrative board wanted to make migration possible for lake dwelling brown trout in lake Lygnern. Because a chemical plant and a railway are situated next to the river and there is a possible concentration of chemicals in the river, investigations were accomplished to find out whether the dam removal has any effect to the stability conditions. Conclusion was that there would not be any significant effect of the dam removal to the stability or water levels of the river. Investigations were made in 2002-2004 and the municipality of Bollebygds bought the plant 2005 to be able to remove the dam. Restoration was done in 2005. A new river was rebuilt upstream and downstream of the old dam, altogether along a 200 m stretch. A small part of the old dam was saved as a reminder of how it once was. Stones and gravel were added to the river bank. Total cost of the restoration was about 5 million Swedish crones (ca. 500 000 euros). Dam removal at Grönkullen, River Rolfsån dam removal at grönkullen, river rolfsån No 200 Rolfsån River Basin Skagerrak and Kattegat River basin River Rolfsån river rolfsån Grönkullen hydro power station grönkullen hydro power station Lake dwelling brown trout Rolfsån River The total costs were about 5 million Swedish crones including investigations, purchase of appropriate rights and their implementation, demolition of the dam and river restoration measures. Fisheries Habitat and biodiversity Hydropower 500 500 - 1000 k€ River Sörån 2005-10-31Z 2453674.5 2005-08-01Z 2453583.5 2012-11-15T08:01:23Z 2456246.834294 2017-06-01T08:31:22Z 2457905.8551157 Dam removal at Grönkullen, River Rolfsån 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Dam removal at Grönkullen, River Rolfsån]] [[Subcatchment title::Rolfsån River]] Dam removal at Grönkullen, River Rolfsån# QUERYbffdc9c1e35b7e6d18839b365691eb6f Case study:Grönkullen hydro power station at River Rolfsån 500 en Grönkullen hydro power station at River Rolfsån REDI 102 en REDI