|Ben Smith Dam (Maynard, MA) with a trickle of water over the top.|
Click on photos to enlarge image.
|Greyish line is river volume; raindrops and snowflakes symbolize|
precipitation per month in inches, so all close to 4"/month except for Feb.
Low water can end quickly. In August 1955 Hurricane Diane brought torrential rain to eastern Massachusetts. Within 48 hours of the storm's arrival the Assabet River went from 1.1 feet to 8.96 feet at the gauge upstream of the Waltham Street bridge. Volume went from 20 cubic feet per second to 4,500 cfs. Main Street near the Main Street bridge, and surrounding buildings, were flooded.