Mark, was your honey hole above the old dam, or below? And was it on the main channel, or a side channel or backwater? I can't tell if the change you show in the photos is the change from impounded conditions to dewatered, with a now much reduced stream channel, or accumulation of silt released into what was formerly a deep and wide free flowing channel below the dam. If the former, it looks about like I'd expect after a season for vegetation to get established--if the streams was really small before it was dammed. If the latter, I've never seen a situation where so much sediment was deposited downstream of a removed dam, but I work in a very different landscape. Either way, you lost a treasured duck spot and I feel your pain.
I've worked on a bunch of dam removals, and sediment management is always a concern. How to deal with it depends on all kinds of factors--how much sediment, is there contamination, how much of the sediment might move. Many dams store very little sediment, especially if they are on relatively steep streams in rocky country. Things are really different in the mid west where the rivers are often flatter and sand bottomed. That Boardman River disaster is a case study--literally--for people who do this work. Lots of screw ups on that one.