Re: ID926438857Eg of June17th 1999 Mentions Siphoning Re Tidal Power

I am not sure syphoning is related to tidal power.  

You generate power from tides by using water turbines that spin when the 
tide flows in or out of a large "basin" or area of water from and back to 
the sea.  You try to find a large tidal change, where the level of water 
changes dramatically.  You also want all of the water to flow in and out 
throug a single point.  Sort of like a closed lake adjacent to the sea, 
with only a small access between.  All of the water has to flow in and out 
through a small opening.  If the lake has a large area, only a few feet of 
change in height of the tide will  cause a lot of water in the lake to 
flow through the channel between.

See the web site below for a description of the only one in North America.
 http://power.about.com/gi/dynamic/offsite.htm?site=http%3A%2F%
2Fwww.nspower.ca%2FAboutUs%2FOurBusiness%2FPowerProduction%
2FHowWeGeneratePower%2FTidalPower.html

See this web site for an explanation of how the power is generated.
 http://inventors.about.com/library/inventors/bltidalplants.htm?
terms=tidal+power

Hope this helps.