It had a brief resurgence during World War II, when horses and barges returned to the canal. CIÉ took over the canal in 1944. As rail and road traffic increased, the canal fell into disuse. In 1974, volunteers from the Inland Waterways Association of Ireland formed the Royal Canal Amenity Group to save the canal. By 1990 they had 74 kilometres of canal, from the 12th lock in Blanchardstown to Mullingar, open again for navigation. In 2000, the canal was taken over by Waterways Ireland, a cross-border body charged with administering Ireland's inland navigations. On 1 October 2010, the whole length of the canal was formally reopened.