Location and features Wappa Dam
water pouring on wall of wappa dam, in may 2015.
the dam located 8 kilometres (5.0 mi) north-west of nambour.
completed in 1963, concrete dam structure 24 metres (79 ft) high , 138 metres (453 ft) long. 12-thousand-cubic-metre (420×10^ cu ft) dam wall holds 4,614-megalitre (1,015×10^ imp gal; 1,219×10^ us gal) reservoir when @ full capacity. catchment area of 69.7 square kilometres (26.9 sq mi) mean annual rainfall of approximately 1,700 millimetres (67 in) includes of maroochy river, dam creates unnamed reservoir surface area of 74 hectares (180 acres). un–gated spillway has discharge capacity of 1,420 cubic metres per second (50,000 cu ft/s). managed sunshine coast regional council, management of dam transferred seq water in july 2008 part of water security project in south east queensland region, known south east queensland water grid. accompanying water treatment plant managed seq water.
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