0000912057-01-531656 424B3 1 20010907 AVALONBAY COMMUNITIES INC 0000915912 6798 770404318 MD 1231 424B3 33 333-57888 1733414 2900 EISENHOWER AVENUE SUITE 300 ALEXANDRIA VA 22314 7033296300 2900 EISENHOWER AVENUE STE 300 ALEXANDRIA VA 22314 AVALON BAY COMMUNITIES INC 19980618 BAY APARTMENT COMMUNITIES INC 19931208 424B3 1 a2058744z424b3.txt FORM 424(B)(3)