Project to drain a 200m stretch (between Gas Street Basin and the The Mailbox of the Worcester and Birmingham Canal in central Birmingham, England. A water leak had been discovered in February 2015 into a disused rail tunnel under the Holliday Street Aqueduct or the adjacent Worcester Wharf. The short drained stretch lies above a road (the Holliday Street Aqueduct) and two rail tunnels (the Cross-City Line and the tunnel to the disused Central Goods railway station. Supporting posts for a temporary dam.