CREATE TABLE table_204_507 (id DECIMAL, "bridge name" TEXT, "location" TEXT, "year completed" DECIMAL, "total length" TEXT, "carries" TEXT)

how many of mccullough 's bridges were completed in 1922
SELECT COUNT("bridge name") FROM table_204_507 WHERE "year completed" = 1922
SELECT COUNT("bridge name") FROM "table_204_507" WHERE "year completed" = 1922