<div class="description">
<p>The Happy Valley Reservoir was built between 1892 and 1897. In addition to water from its reserve, the reservoir receives water from Mount Bold Reservoir (via the Clarendon Weir). Built between 1892 and 1897 at a cost of $1.8 million it was the third reservoir constructed in South Australia as a supplement to the Thorndon Park Reservoir (built 1860) and the Hope Valley Reservoir (built 1872). This section of pipeline would have transported water from Clarendon Weir to the Happy Valley Reservoir.
On 7 August 1896, the tunnel's inlet valve was opened by the Governor of South Australia, Sir Thomas Fowell Buxton and the reservoir began filling. The weir was listed on the former Register of the National Estate and has been listed as a state heritage place on the South Australian Heritage Register since 8 November 1984.
</p><p><br></p><p>Beginning n 1892, workers constructed a pipeline from Clarendon Weir on the Onkaparinga River to the Happy Valley Reservoir. Water first flowed into the reservoir in 1896.
See
</p>
Marianne Hammerton, 'Water South Australia, A History of the Engineering and Water Supply Department', p. 114</div>
<div class="fn value">
State Government Photographer</div>
The History Trust of South Australian,  South Australian Government <br> Photo <a rel="nofollow" class="external autonumber" href="http://data.history.sa.gov.au/sagpc/media/preview/10202?maxsize=1000">[1]</a> <br> Object record <a rel="nofollow" class="external autonumber" href="http://data.history.sa.gov.au/sagpc/getitem/10202">[2]</a>