The adult Peregrines continue to stay in and near the nest box.  They regularly feed the chicks and then stay nearby but often times outside of the nest box or perched on the tower in proximity of the nest box.

Links to news on other Peregrines:

Four peregrine falcon chicks at Ambassador Bridge             

Baby Peregrine Falcon Chicks in North Bend Receive Tags …

Three falcon chicks hatch at Statesman Towers