 The roadway on its current alignment has existed since at least 1926 , however there are records of a road between Paterson and Prosser since 1906 . The highway was designated Secondary State Highway 8E ( SSH 8E ) in 1937 , but the route number was changed to SR 221 during the 1964 state highway renumbering . 
 The roadway on its current alignment <a href='been_done' title='1'><mark>has</mark></a> existed since at least 1926 , however <a href='dey_it' title='2'><mark>there</mark></a> are records of a road between Paterson and Prosser since 1906 . The highway was designated Secondary State Highway 8E ( SSH 8E ) in 1937 , but the route number was changed to SR 221 during the 1964 state highway renumbering . 
Da roadway on its current alignment done existed since at least 1926 , however it is records of a road between Paterson and Prosser since 1906 . Tdahighway was designated Secondary State Highway 8E ( SSH 8E ) in 1937 , but the route number was changed to SR 221 during thda964 state highway renumbering .