Thank you for your reply!
The poles sound like a good idea...I am very concerned about the cribs sliding on the river bootom...the TF would not like this!
Did the cribs have a bottom? Almost eveything I have read shows cribs with a bottom. Makes sense...something has to apply the weight of the rocks to the crib!
HOWEVER, I just met with a person who seemed very knowledgible. Since my river bottom has fat/jagged rock, he suggested using bottomless cribs filled with flat jagged rocks to "lock" into both the river bottom and the sides of the crib. I don't think this is the norm...but it sounds logical.
BTW, the waterfront is the St Lawrence River! Located in Morristown, NY.
Joel
