This publication provides expert guidance on the application of the Reservoirs Act 1975, reflecting the current views and practices of the dam engineering profession. It aims to encourage high standards of safety - promote the proper application of the Act by all parties involved - encourage a consistent approach in the application of the Act - provide a reference document for use by all who have an interest in reservoirs. This easy to use guide is especially useful in situations where enforcement authorities, undertakers and panel engineers have experienced difficulty in applying the requirements set out in the Act.