Another source for maps on the web is at www.maptech.com. They have maps in both topograpical and nautical versions that you can view and print or order from them. I looked at the OP maps this AM and they are not that good for the rivers, but in larger bodies of water such as the Columbia or Puget Sound they give good detail. Hope this helps out.
Good luck and tight lines, Jeff

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"Never be afraid to try something new."

Remember, amateurs built the ark.
Professionals built the Titanic.