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Name:	laureleg -	Reply
Subject:	is it ever 490 ?
Date:	6/13/2009 7:03:17 PM

We are slowly doing things to prepare our lot for building our lake house. We have had the cove dredged and built a seawall. the seawall had to be 491, a foot over full pool. So how come the lake level is never allowed to go to full pool when we have an additional foot for overage? I am very excited that the lake is up but this puzzles me!?! Is the 491 requirement a newer requirement? Does anyone know the history of required seawall heights?

Name:	wix -	Reply
Subject:	is it ever 490 ?
Date:	6/14/2009 8:53:57 AM

Don't think you'd want the seawall at 490'. Wakes and wind waves would wash over the seawall and undermine the wall and create dangerous pressure behind the wall from the water washing over the top. As far as your dock, I would recommend that your stringers be just above the 490' so waves can move under the dock freely rather than banging against the dock.

Also, keep in mind that 490' Martin datum is full pool and 491' mean sea level (msl) are both used by officials. These terms both mean the same lake level but use different reference standards. Always look at the suffix when reading lake level. Conversion to the "msl" levels is slowly becoming the new measurement tool.

Name:	Mack -	Reply
Subject:	is it ever 490 ?
Date:	6/14/2009 9:03:44 PM

Ditto on the extra height. It is a good thing to do.When boat wakes or wind driven waves go over the top at all, hydraulic pressure will push even a concrete wall back into the lake. Do it.

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