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Water from Tantawanglo Creek is withdrawn from Tantawanglo Creek Weir - a pipehead weir located in the South East Forest National Park, about 30km south-west of Bega. The amount of water extracted depends on the flow in the creek and the licenced daily extraction limits. Daily extraction volumes range from 0 ML/d (during very low drought flows) to a maximum of 5 ML/d (for creek flows that are greater than 10 ML/d).
Water from Tantawanglo Creek weir is piped to Yellow Pinch Dam (approximately 35 km). Water in the pipeline flows by gravity and is boosted by Wolumla booster pump station. The pipeline from Tantawanglo Creek to Yellow Pinch Dam supplies water to Candelo, Wolumla and 176 rural properties upstream of Yellow Pinch Dam.
Tantawanglo Creek is the main source of water for Yellow Pinch Dam. The Bega River, via the Bega to Yellow Pinch Dam pipeline, is another source of water for Yellow Pinch Dam. It is used to fill the dam during moderate to high flows in the Bega River at Bega. Another minor source of water for Yellow Pinch Dam is the small catchment area of the dam.
Water stored in Yellow Pinch Dam is used throughout the year and to meet peak holiday supply needs. Yellow Pinch Dam supplies water to Merimbula, Tura Beach, Pambula Beach, Pambula and 70 rural properties downstream of Yellow Pinch Dam.
Water availability from Tantawanglo Creek becomes limited during drought. Less water is extracted as the flow in the creek lowers. Water stored in Yellow Pinch Dam is pumped upstream during dry times to maintain the supply of water to Candelo, Wolumla and rural properties upstream of Yellow Pinch Dam (ie. the flow is reversed).
Water from the Kiah borefield is withdrawn from five shallow bores located in the alluvial aquifer of the lower Towamba River. The amount of water extracted depends on the flow in the Towamba River and the licenced daily extraction limits. Daily extraction volumes range from 1 ML/d (during very low drought flows) to a maximum of 5 ML/d (for river flows that are greater than 15 ML/d). The maximum licenced daily extraction limit is 12 ML/d (for river flows greater than 34 ML/d) however supply system augmentations are needed to achieve this.
Water from the bores is pumped to Boydtown Balance Tank from where it flows by gravity to Eden Reservoirs (and Ben Boyd Dam when the dam is being filled). Water stored in Ben Boyd Dam is used to supplement supply from the Kiah borefield, to meet high water usage periods and to maintain supply during dry times when water from the Kiah borefield source is limited.
The Kiah borefield and/or Ben Boyd Dam supplies water to Boydtown, Eden, South Pambula and 160 rural properties between Kiah and South Pambula. Water from the south can also supplement water from the north during dry times.
There are currently no water restrictions in place. For details on water restrictions and trigger levels in the Bega Valley Shire Council water supply area please visit http://www.begavalley.nsw.gov.au/Your_Council/Policies/procedures/2-4-1e.pdf.