Abstract: Owners of a portfolio of dams face the difficult challenge of prioritizing a number of dam safety deficiencies of varying degrees of seriousness. Regulators and company shareholders demand justification for capital expenditures and transparency in all decision-making. The dam asset manager must be able to summarize and continuously monitor the health and risk of the dams in the portfolio, and be able to convey this information to senior company managers, Board of Directors, and regulators in a manner that is concise and easily understood.
This paper presents a methodology for prioritizing dam safety remedial works based on the physical condition of the dam, the degree of deficiency of the dam under design loading conditions for various potential failure modes, the probability of occurrence of the design loading condition, and the consequences of failure of the dam. It uses information that is already available in the Dam Safety Reviews, so no additional engineering studies are required. A standardized spreadsheet format is presented which is used to store the dam safety information and undertake the risk assessment and prioritization of dam safety remedial works. The spreadsheet also serves to provide transparency in the prioritization process, and summarizes key information about the health of the dams that the dam asset manager can use to manage the portfolio in a structured and transparent manner and is also easily understood by senior company managers, Board of Directors and regulators.

Key words: risk, decision making, remedial works, prioritization

摘要： 拥有多座大坝的大坝业主经常面临的困难挑战是需要对不同严重程度的大坝安全缺陷进行排序。监管者和企业利益相关者要求资本性支出均合情合理，所有决策制定都具有透明性。大坝资产管理者必须能总结和持续监测资产中大坝的健康和风险，并将这些信息以一种明确和简单易懂的方式传达给企业高管、董事会和监管者。
笔者介绍了一种确定大坝安全修复工程优先性的方法，它基于大坝的物理状态、大坝在各潜在溃坝模式下的各设计荷载工况中的病险程度、出现设计荷载工况的概率和大坝溃决的后果。它使用大坝安全复核中已有的信息，不需要再做额外的工程研究。文中还给出了一个标准的电子表格格式，用于存储大坝安全信息并着手风险评估和大坝安全修复工程的优先排序。该电子表格还用于提供优先排序过程中的透明性和总结关于大坝健康的关键信息。大坝资产管理者可使用这些关键信息以一种系统的、透明的方式管理大坝，该方法易于被公司高管、董事会和监管者理解和接受。

关键词: 风险, 决策制定, 修复, 优先性