I've read through the entire thread (thus far) and think this is an awesome Eagle Scout project. My 10 yr-old son just "crossed over" into a Scout Troop. Our community has three detention ponds (all populated with fish) that we've discussed as a similar Eagle-project in a couple of years.
The portion of your introduction that caught my eye is below....
I also plan on planting different types of non-invasive aquatic grasses in the two ponds at different depths to suit the needs of the largemouth bass population.
Hyacinth was included in your list of proposed plants. You better check out that plant very closely before proceeding. Winter temps at your latitude would likely prevent hyacinth from posing a problem - or benefit. Either way, it is on the Federal noxious/invasive specie list. As such, transporting and introducing it to new sites could pose issues.
Also, determine if any herbivores (fish, reptiles, invertebrates) currently exist in the ponds - in case they might interfere with different plant-culture introductions. In some cases, it may be necessary to construct enclosures to provide protection for newly stocked plants.
