CREATE TABLE table_49505 ("Name" CLOB, "Built" CLOB, "Listed" CLOB, "Location" CLOB, "County" CLOB)

In what year was the bridge in Clarkdale built?
SELECT "Built" FROM table_49505 WHERE "Location" = 'clarkdale'
SELECT "Built" FROM "table_49505" WHERE "Location" = 'clarkdale'