This site's always great for a chuckle.
Beeee the dirt?
I love that.
Most books won't be specific about dirt because dirt is never specific.
In an ideal world, on an ideal mountainside, if you can combine soils to create dirt with 30% clay content, you have soil that can be compacted. Compacted soils leak less, are better to build with, my dear, and won't eat your dam.
Without having to consider bentonite, plant trees as close to the water's edge as you dare. Different trees have different needs. Willows need wet, oaks need dry. Base proximity of planting on the needs of the tree.
Beeeeee the treeeee.


Teach a man to grow fish...
He can teach to catch fish...