CREATE TABLE table_49334 ("Name" TEXT, "Built" TEXT, "Listed" TEXT, "Location" TEXT, "County" TEXT)

what's the county name for the republican river bridge listed on 1992-06-29?
SELECT "County" FROM table_49334 WHERE "Listed" = '1992-06-29' AND "Name" = 'republican river bridge'
SELECT "County" FROM "table_49334" WHERE "Listed" = '1992-06-29' AND "Name" = 'republican river bridge'