So today I spent a little while in the dinghy with my new depth sounder... Taking measurements. All of the readings in the picture above are ones I made. Since I am crowd sourcing this data, I made sure that it was corrected for the tide before adding it to the chart.
Three things were learned:
1. There is adequate water off that private dock should we need to tie to it in an emergency
2. The shoal area to the north of the dock is marked too shallow on the charts.
3. The "buoy" that marks the wreck directly in front of us (I thought) actually is apparently an abandoned mooring. But having marked it as a wreck is probably a good thing anyway tho, since when (not if) the float breaks away or rusts thru in a couple more years, no one would want to anchor on top of whatever is down there as an anchor and whatever rode remains.
More surveying to come...