All hydraulic projects subjected to freezing temperatures have ice problems, such as: ice buildup on lock walls, hydropower intakes, and lock approaches; ice accumulation in navigation channels; ice passage over spillways that scours the downstream channels; and ice damage to shore structures and shorelines, etc. Therefore, ice control measures should be considered for both new and existing projects to improve operations and safety in cold regions. In Part I, this manual contains a discussion of ice formation processes, physical properties, and potential solutions to associated problems. Part II considers the problem of ice jams and ice jam flooding, and discusses a broad range of mitigation measures. Part III of this manual addresses the considerations that arise from winter navigation on inland waterways, including the conduct of river ice management studies and the preparation of river ice management plans.