Heavy rainfall during April 27-30, 1979, resulted in moderate to record flooding in much of northern and western Maine. During this period, rainfall totals of as much as 6 inches were measured. This period was preceded by up to 10 days of seasonally warm temperatures and snowmelt, which helped create conditions favorable to flooding later in the month. Flood peaks having recurrence intervals greater than 30 years were recorded at several sites, and a few sites experienced maximum recorded flood peaks with recurrence intervals in excess of 50 years. There was no loss of life, but local damage to homes and commercial and industrial establishments was significant. This report describes the flooding. A tabulation of peak gage heights and discharges is included for 42 sites. Daily and storm precipitation values are tabulated for 58 sites. (USGS)