The arm going off to the right is the Ingenika Arm. On the large version of this photo you should be able to see the Ingenika Airstrip. The BCFS used to base A-26 waterbombers there in the summer.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/44389375@N00">Shawn</a> from Airdrie, Canada
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/cdnav8r/1387479700/">North End of Williston Lake</a>