I used to think this was a requirement of the Army Corp and Federal Government but, this seems to have been reduced and offen ignored other than major shipping areas. Many waterways that used to exist 50yrs ago are now unusable or restricted which has caused businesses to go under and properties losing access to usable depth water. There is also the issue of all the cost and hurdles to attempt w/o government involvement. Significant weather in recent years has also added to runoff and erosion which compounds the problem. I could go on and on with this subject, maybe someone will see it?