澳大利亚最大的可再生能源项目Snowy 2.0的成本预算出现严重超支。该项目预算从最初的20亿澳元飙升至250亿澳元，增幅超过12倍，完成时间也从2021年推迟至2029年底，延期长达8年1。
项目成本失控的主要原因在于规划阶段的准备不足。该项目的前期预算估计基于不完整的施工设计，三年前的预算仅为120亿澳元，但这些估算后来被证明远不能反映实际需求1。完工后，Snowy 2.0将具备2200兆瓦的发电功率，可为约300万户家庭提供一周的电力供应1。
这一成本超支现象不仅反映了Snowy 2.0项目管理的问题，也映射了澳大利亚整体基础设施投资的风险。根据德勤报告，有13个公共资助项目的成本超支总额达130亿澳元1。目前正在规划中的主要项目也面临成本压力，其中高速铁路项目的预计成本至少为93亿澳元，墨尔本郊区铁路环线第一阶段的预计成本至少为33亿澳元，高铁项目预计将在2028年作出最终决策1。
Australia's largest renewable energy project, Snowy 2.0, has experienced a dramatic cost escalation that underscores mounting challenges in delivering major infrastructure initiatives.1 The project's budget has ballooned from an initial A$2 billion to A$25 billion—an increase of more than 12 times—with completion now pushed back from 2021 to the end of 2029, representing an eight-year delay.1 Three years ago, the project was estimated at A$12 billion, though this figure was based on incomplete construction designs.1
The cost spiral reflects deeper structural problems in project planning and governance.1 When former Prime Minister Malcolm Turnbull announced the initiative in 2017, it lacked a comprehensive business case and detailed design specifications, creating conditions for substantial budget revisions as planning matured.1 The project is designed to generate 2,200 megawatts of capacity, sufficient to supply electricity to three million households for one week.1
The Snowy 2.0 overrun is emblematic of a broader pattern affecting Australia's public infrastructure sector.1 A Deloitte report identified 13 government-funded projects that have collectively exceeded their budgets by A$13 billion.1 Other major projects facing cost pressures include a high-speed rail initiative, estimated at a minimum of A$93 billion, with a final investment decision expected in 2028,1 and the first stage of the Melbourne suburban rail loop, projected to cost at least A$33 billion.1
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