Just to show that Bizer isn't the only reference to this NRZ, here is what Navionic's web app shows as the NRZ.
Since people have a hard time seeing the fine print of the NRZ, I enhanced the NRZ boundary in a thicker red line.
With both Bizer and Navionics, there are at least two independent sources that think that this is the NRZ in Winter Harbor. But now that Bizer is saying that they are removing it from their chart (the source I trust the most on the lake), it's going to get interesting out there.