Nice looking plan for the new pond. Plenty of rock/stone/concrete will create lots of good habitat. for small fishes. It will be interesting to see how your pond progresses and matures as time passes. Please keep us updated. We can learn lots of good things from your pond adventures. There are all sorts of 'natural' pathways that stream minnows can find their way into a pond. "Nature has its ways".
Stream chubs that rarely spawn in ponds, especially the large mature creek chubs (8"-10") have little benefit in ponds except for being soft rayed forage fish for big predators. Small adult size chubs in the Fingerlakes area are always good prey fish for SMB. Do good homework recognizing local stream minnow type fishes. Good, clear, close, side view pictures from your catches and we can help identify things caught in a minnow trap/s. Minnows freshly dead are easiest to photograph. also good are pictures of fish in a zip loc bag with a small thin wall amount of water between the two walls of the bag.
Here are some good pictures of what the very common bluntnose minnow looks like. Notice the rounded nose, dark lateral body stripe, and the prominent black spot at the tail end. BNM will thrive very well in a pond such as you are planning. It also grows real well in small lakes with good refuge habitat
http://fishesofboneyardcreek.weebly.com/bluntnose-minnow.htmlhttps://gallery.nanfa.org/v/members...notatus+Bluntnose+Minnow+4677ws.JPG.htmlhttps://tnacifin.com/fish/bluntnose-minnow/https://therouge.org/bluntnose-minnow/
