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Mount Crosby Weir
The Mount Crosby Weir is a weir on the Brisbane River at Mount Crosby in South East Queensland, Australia. The project was instigated by John Petrie at the end of the 19th century. The town of Brisbane was expanding and seeking more reliable sources of drinking water than Enoggera Dam and Gold Creek Dam could provide.
==Location and features==
The location was selected because it was just above the upstream tidal flow of seawater at Colleges Crossing. The concrete structure was completed in April 1892. The dam wall rises and is in length.〔 The weir has a capacity of , making it one of the largest weirs in the region.〔 Above the weir is a one-lane road which is open to the public.
The nearby Mount Crosby Pumping Station is used to transport drinking water that is sourced from the weir as well as Lake Manchester Dam built shortly after the Mount Crosby Weir.
Without an ongoing eradication program water hyacinth weed can choke the waters behind the weir, all the way upstream to Fernvale. In 2009 the weir was flushed to remove algai and organic matter that had built up.〔 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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