Columbia Basin Federal Credit Union Address: 260 C St Sw, Ephrata, WA 98823 Phone: (509) 754-2031 Banks, Mortgages, Federally Chartered Credit Unions Other Businesses: US Bank at 121 Basin St Nw, Ephrata, WA 98823 Washington Trust Bank at 12 Basin St NW, Ephrata, WA 98823 Chase Bank at 109 W Division Ave, Ephrata, WA 98823 Granco Federal Credit Union at 217 Alder St Sw, Ephrata, WA 98823