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克罗蒂大坝（ＧｒｏｔｔｙＤａｍ）位于塔斯马尼亚（Ｔａｓｍａｎｉａ）西海岸，为混凝土面板砾面堆石坝，长２４０ｍ，高８３ｍ。由于该坝是第一次在大坝顶部设正常溢洪道，并在坝的下游面设泄槽，故引起建坝工程师们的很大兴趣。此坝竣工于１９９１年７月，从那时起有３次小规模泄洪。泄洪时间最长的一次历时５天，最大洪水超高０．４８ｍ。在承受更大的泄洪量时，大坝与溢洪道的性能尚有待观测，然而，满库水位下（库水位多次达到或接近溢洪道堰顶）的静力学性能也和所预计的相同。本文阐述了为什么选择这样一种不同寻常的设计布置。关于砾石填筑料的特性、溢洪道的设计思想及特性、大坝与溢洪道目前的状况也一并作了详述。
The Grotty Dam, on the west coast of Tasmania, is a concrete-faced gravel rockfill dam measuring 240 meters in length and 83 meters in height. Dam construction is of great interest to the dam as it is the first time a normal spillway has been installed at the top of a dam and a drain has been provided downstream of the dam. The dam was completed in July 1991 and since then there have been three small-scale flood discharges. The longest flood discharge time lasted 5 days, the maximum flood 0.48m high. The performance of dams and spillways remains to be seen when larger spills are experienced. However, the static performance under full water levels (where the reservoir level has reached or is close to the top of a spillway weir) is also the same as expected. This article explains why such an unusual design layout was chosen. With regard to the characteristics of gravel packings, design concepts and characteristics of spillways, the current status of dams and spillways is also described in detail.