Nevada County is expected to make changes to its employee roster, adding two-thirds of a full-time equivalent employee to bring the full roster to nearly 772 employees. The public institution — which has a $181 million budget and spends about 43 percent of that paying its staff — will hire one half of a full-time equivalent at the library. The Nevada County Board of Supervisors will be asked to approve the staff alterations at today’s regular meeting, slated to start at 9 a.m. at the Rood Center. The Nevada County Sheriff’s Office has added a dispatch position but also subtracted …