a strong or special association with a person, or group of persons, of importance of cultural or natural history of New South Wales's history. The original watercourse and catchment would have provided a resource for exploitation by the Gadigal people who occupied the southern shore of Sydney Harbour at contact and their ancestors. As a result of the severity of this displacement the Tank Stream has become symbolic of the European settlers immediate appropriation of essential resources and Aboriginal dispossession. The Tank Stream influenced, and has been influenced by, Governor Phillip and subsequent early governors of the Australian colony. The course of the stream determined Phillip's siting of the first camp and this early administrative decision influenced the subsequent urban form of Sydney. The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales. The Tank Stream features fine quality stonemasonry and brickwork from the nineteenth century, houman scale and an intriguing form showing layers of different phases of construction. This includes modifications introduced to improve the operation, e.g. terracotta drains. The place has a strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons. The Tank Stream is of State significance for its recognition in the community with the placement of Sydney in its current location, as evidenced by the popularity of tours. Community value of the Stream has increased with the growth of heritage consciousness since the 1970s. The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales. The sections of the former Tank Stream south of King Street which survive have potential for retaining evidence of the earliest periods of its human use. This includes early construction, brickmaking and waterproofing techniques. The swampy source of the stream may provide evidence of past environmental conditions and potentially of Aboriginal occupation prior to European arrival. The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales. Tank Stream is of State significance as the only water source available to the First Fleet arrival in their settlement of Sydney. Tank Stream is the only surviving evidence of this early period of water resource development. The fabric of the Tanks Tream and its enclosing stormwater drain contains rare surviving evidence