East side of O'Donnell Bridge viewed from water level.  This is the beginning of the Lowell Canal System's Northern Canal.  Located at the southeast end of the O'Donnell Bridge in Lowell, Massachusetts.
<a href="//commons.wikimedia.org/wiki/User:Emw" title="User:Emw"> Emw</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>