The purpose of this memo is to present results of water balance analysis for each of the five tailings storage alternatives (Alternatives 2 through 6). Project water sources and use are described in detail in section 3.6 of the GPO (Resolution 2016). A large part of the consumptive water use of the Project is associated with the tailings storage facility (TSF) and can vary considerably depending on the tailings facility design, location, and storage methods.