Over the next 10 years, Nevada County is facing a change of epic proportions. By the year 2020, 71 percent of residents is projected to be age 60 or older, reports the Area 4 Agency on Aging. While this looming “silver tsunami” presents a whole host of questions regarding the county’s future, among the most significant, say area social workers, is “Who will care for us?” In an attempt to stay ahead of the curve, two Nevada County women have teamed up to put forth a program with three complementary goals: provide high quality, affordable care and a support network …