Bugsworth in Derbyshire. At that time, major warehouses and mills would cut private canal arms to their buildings, the Rochdale had many. In 1837, the Manchester Bolton & Bury Canal was connected to the Irwell, and there was commercial pressure to connect the Bridgewater/Rochdale to them. The Manchester and Salford Junction Canal, 1837, was cut from the Rochdale under the city to provide the link with the Irwell at Quay street. To preempt this, the Bridgewater Canal Company built the Hulme Locks Branch Canal, completing it in 1831. This canal remained open until 1991, when it was replaced by a lock at Pomona No. 3 basin. These canals did not have the capacity to take boats larger than 1.4 m wide, so trans-shipment to oceangoing vessels was needed at a point outside the city. The Manchester Ship Canal, the long river navigation was designed to give the city of Manchester direct access to the sea, and was built between 1887 and 1894 at a cost of about £15 million (£1.27 billion as of 2010), and in its day was the largest navigation canal in the world. Though the main docks were at Salford Quays and Pomona Docks the ship canal started at the Woden Street footbridge at Hulme Locks. Warehouses of Castlefield The Duke's Warehouse was built at the end Bridgewater Canal over the River Medlock. It has long since gone. It was first built in 1771, destroyed by fire in 1789 and rebuilt and extended including a fulling mill on the southern bank and cottages on the northern bank. It was destroyed again by fire in 1919. Built at the same time was the Grocers Warehouse 19.4 x 9.7m. This was a five-storey warehouse with one then two shipping holes. It was cut back into the Collyhurst sandstone river cliff face to the north of the Medlock. It was designed by James Brindley and incorporated a waterwheel driven hoist system. The canal arm was continued into a tunnel in the cliff. It was modified and extended in the first decade of the 19th century when the Rochdale canal was cut behind it. The tunnel was severed and became an arm of the Rochdale Canal. Part of the facade has been restored and the canal arms are bridged by two Dutch style lifting bridges. The Merchants' Warehouse (46.2 m x 15.4m) was built on the north bank at the entrance