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Mangrove Creek Dam, a concrete faced rockfill embankment dam, is the primary reservoir for water supply to residents of the Central Coast in New South Wales, Australia.. The dam, with a capacity of 190,000 megalitres (6,700 × 10 ^ 6 cu ft) and fed by a catchment area of 101 square kilometres (39 sq mi), is operated by the Central Coast Water Corporation and supplies approximately 93 per cent ...
[8]: 15–17 The Scheme was a significant feat of engineering at the time of construction. In June 1885 Sydney was in the grip of a severe drought and the Upper Nepean Scheme was incomplete. The Government accepted an offer from Hudson Brothers to bridge the gaps and deliver 14 megalitres; 3.6 million US gallons (3 × 10 ^ 6 imp gal) of water ...
The impounded reservoir is called Lake Glenbawn. Glenbawn Dam was created through enabling legislation enacted through the passage of the Glenbawn Dam Act, 1946 (NSW). The Act appropriated A£ 1,500,000 as the estimated cost of construction of the dam.
Water flows 16.6 km (10.3 mi) from Tantangara Reservoir to Lake Eucumbene via the 3.1–3.35 m (10.2–11.0 ft) diameter Murrumbidgee-Eucumbene tunnel falling 40 m (130 ft) in the process. Flow is controlled by a 1.83 m × 2.13 m (6 ft 0 in × 7 ft 0 in) regulating gate such that a maximum of 20 m 3 /s (710 cu ft/s) is allowed.
WaterNSW also owns and operates the largest surface and groundwater monitoring network in the southern hemisphere. [ 2 ] WaterNSW was established on the 1 January 2015, under the Water NSW Act 2014 , merging the State Water Corporation (which managed the states rivers and dams other than Sydney) and Sydney Catchment Authority which managed ...
The average water depth is 7 metres (23 ft) and, at 100% capacity, the dam walls hold back 1,731,216 megalitres (61,137.3 × 10 ^ 6 cu ft) of water at an average of 60 metres (200 ft) above sea level. The surface area of the lakes within the scheme is 47,500 hectares (117,000 acres) and the combined catchment area is 273,226 square kilometres ...
Testing conducted by Sydney Water in June 2024 found that levels of PFAS in the Cascade Dams were greater than 10ppt. [5] Levels of PFOS and PFHxS in the "Katoomba" Cascade dam were measured at 16.4 and 14.2ppt respectively, while the "Blackheath" dam contained 15.5 and 13.6ppt respectively. [ 5 ]
As their top water level was 113 metres (371 ft) above sea level, the pair were able to service the suburbs of Chatswood, North Sydney, Mosman, and a small portion of Ryde by gravity. Supply to Manly could also be obtained from the reservoirs by means of gravitation through Mosman reservoir after it was built in 1904.