Complex sentence: A lease of OFWJ was not possible at the time, but planning and administration for all three railways were centralized to Eskilstuna in 1900, with a regional office in Kopparberg.
Split into simpler sentences: A lease of OFWJ was not possible at the time, but it was possible to coordinate many functions, and this was done from 1900. The common administration was headquartered in Eskilstuna, with a regional office in Kopparberg.