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Water Kit - Hunter Water

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<strong>Water</strong> From The Mountains<br />

Chichester Dam holds 21,500ML(one<br />

megalitre (ML) is one million litres).<br />

The catchment covers 120km2.<br />

The wall is constructed from<br />

thousands of inter-locking units of<br />

concrete. The 1000mm pipe to<br />

Newcastle is 85km long. After<br />

completion investigations began on<br />

a third source with a view to closing<br />

the Walka <strong>Water</strong> Works, the likely<br />

choice being the Tomago Sandbeds.<br />

More <strong>Water</strong> From<br />

Underground<br />

The Tomago Sandbeds stretch 25km<br />

from Tomago to Port Stephens and are<br />

4km wide. The total catchment<br />

area is 105km2. Sand deposits<br />

underground hold freshwater ranging<br />

from 7m above to 15m below sea<br />

level. <strong>Hunter</strong> <strong>Water</strong> extracts up to<br />

16,500 ML per year of raw water<br />

through a system of bores and pump<br />

stations. Extracted water is treated at<br />

the Tomago Treatment Plant.<br />

Production and Consumption<br />

Through the 1950s the <strong>Hunter</strong> kept<br />

growing as a major commercial centre<br />

for coal, steel, manufacturing and<br />

agriculture - serviced by the port of<br />

Newcastle. Growth in water use was<br />

linked to industrial activity; between1939<br />

and 1952 the population suppliedwith<br />

water rose 10% but waterconsumption<br />

jumped by 90%. Demand again placed<br />

pressure on available supply.<br />

1925 1940<br />

1955<br />

Depression and Then<br />

Recovery<br />

The Walka <strong>Water</strong> Works were closed<br />

in 1931 due to the Great Depression<br />

By 1935 the economy had recovered<br />

and in 1936 work began on the<br />

Tomago Sandbeds. The <strong>Water</strong> Board<br />

played a crucial role during World<br />

War II during which time consumption<br />

grew 50%. As a result, the Tomago<br />

Sandbeds changed from a backup<br />

water source to an indispensable<br />

part of the water system.<br />

1937<br />

<strong>Water</strong> kit . ssS . 001 . april 2010<br />

9

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