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Bill Gunn Dam : ウィキペディア英語版 | Bill Gunn Dam
The Bill Gunn Dam is an earth-fill embankment dam with an un-gated spillway located off-stream in the South East region of Queensland, Australia. The main purpose of the dam is for irrigation of the Lockyer Valley. The resultant reservoir is called Lake Dyer. ==Location and features== Located west of the town of Laidley, the dam was developed to increase the capacity of the existing Lake Dyer, a natural lake adjacent to Laidley Creek, a tributary of Lockyer Creek. The dam was named after the Queensland politician Bill Gunn and is managed by SEQ Water.〔 The long earthfill structure has a maximum height of and an overflow spillway which diverts excess water into Laidley Creek. The dam has a storage capacity of and a maximum surface area of . Water from the dam is used for irrigation, in the densely cropped Lockyer Valley.〔 Bill Gunn Dam suffers from high drawdowns and summer evaporation which together with phosphate fertilizer creates significant blue green algae problems.〔 In November 2005, during drought conditions in the area, the dam's water level declined to just 1%.
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