Are you a magazine subscriber? Mike Otto has had a column in every issue since March 2003. Bill Cody has been kind enough to list out the articles by issue for all of us in the Product Sources section. Here's the link for 2003 http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=18;t=000010
There is some good reading on core trenching for your dam. You can purchase the back issues through Pond Boss.


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