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The Anaconda Smelter Stack is the tallest surviving masonry structure in the world, with an overall height of about 585 feet (178.3 m), including a brick chimney 555 feet (169.2 m) tall and the downhill side of a concrete foundation 30 feet (9.1 m) tall.
The bricks at Pindi Pindi were made by the semi-plastic method. A tramline ran from the clay and shale pit to the works. The clay was ground in the pan and then dropped into the brick press. The building bricks and fire bricks used the dry press method, however, bricks for fire arches in locomotive fireboxes had to be fashioned manually. [1]
A brick chimney rises near the center of its length, near a projecting stair house which rises above the main roof line. [ 2 ] The mill was built in 1884 and enlarged in 1892, and was owned by a consortium of local business leaders.
The power house site immediately east of the chimney contains concrete engine mounts, brick boiler foundations and the brick base of a metal chimney. [ 1 ] A large and remarkably intact slag dump extends north of the main chimney for about 120 metres (390 ft) to a small watercourse.
The most dominant feature of the mill is the brick chimney stack, which is still visible from the road. It is some 20 metres (66 ft) high, slightly tapered and finished with corbelled and dentil courses at the top. The bricks measure 9" by 4" by 3", and are laid in English bond separated by 15 millimetres (0.59 in) of sand/lime mortar.
Modern high-efficiency furnaces can be up to 98% efficient and operate without a chimney, with a typical gas furnace being about 80% efficient. [1] Waste gas and heat are mechanically ventilated through either metal flue pipes or polyvinyl chloride (PVC) pipes that can be vented through the side or roof of the structure.
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It measures 24 ft (7.3 m) by 30 ft (9.1 m) and features a brick chimney for a large, 9 ft (2.7 m) kitchen fireplace. It is the oldest surviving house in Berks County and one of the few remaining examples of a Swedish settler's dwelling. The house was restored by the Historic Preservation Trust of Berks County. [2]