Shore Gas Company in 1938, but continued to make gas at the Manly site. Coal was unloaded at a wharf on the Spring Cove side of the site. Manly obtained at least some of its coal from the Balmain Colliery, but over the years most to its coal came by sea. Parramatta There was also a small gasworks, at Parramatta, operated by the Parramatta Gas Company from 1873. After it was purchased by AGL, it was closed down in 1891 and its customers were supplied from Mortlake. Although it was on the south bank of Parramatta River, the Parramatta gasworks was too far upstream for berthing a "sixty-miler". The closest deep-water wharf was the Redbank Wharf, near the confluence of the river and Duck River, from where a steam tramway ran past the gasworks site on its way to the township. However, there was a wharf at the gasworks itself and coal, most likely, would have been landed there from coal lighters. Blackwattle Bay coal wharves and depots Blackwattle Bay is an inlet lying between the Pyrmont Peninsula and Glebe Point to the east of Rozelle Bay. Blackwattle Bay was once much larger in area. The shallow part of the inlet—then known as Blackwattle Swamp—was filled in, in the late C19th, to create what is now Wentworth Park. There were three coal depots at Blackwattle Bay, located between the reclaimed shoreline and Pyrmont Bridge Road. Coal arrived by sea on "sixty-milers" and was distributed to resellers and other customers by road transport.The most easterly was Wharf 21, operated by Jones Brothers Coal Co.. It opened around 1926, after Jones Brothers expanded their operations and relocated, from Darling Harbour at the bottom of Bathurst St. In its final form, this installation consisted of a timber wharf—with ships berthing parallel to the shoreline—a gantry crane with a grab for unloading, and a bunker structure. The first level of the bunker structure was made of concrete and brick and it had coal bunkers made of hardwood timber as its second level. The two long edges of the bunker structure carried rails for the travelling gantry crane. It appears that the coal bunker structure and gantry crane dated from around 1951. West from Jones Brothers was R W Miller & Co.'s wharf—perpendicular to the shoreline—and further west was Wharf No. 25, the business of Howard Smith Ltd. The Howard Smith coal wharf was already