Topaz Lake is a relatively large reservoir, with a maximum pool of , with  surface, a length of , a width of , and a maximum depth of . The levee and reservoir have been owned and operated by the Walker River Irrigation District since its construction.
Topaz Lake is a substantial water storage facility that includes a maximum volume of , covering an area of  on its surface, with dimensions of length and width, and a greatest depth of . The management of this reservoir has been entrusted to the Walker River Irrigation District since its creation.