Rob

Here are more points for your delta kmz file:

Blackslough Landing (missing): 37°59'42.00"N 121°25'12.00"W
http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Blackslough+Landing&units=f

Borden Highway Bridge, Old River (missing): 37°53'12.00"N 121°29'6.00"W
http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Borden+Highway+Bridge%2C+Old+River&units=f

I have a similar setup in my google earth app too, but these points on my map were missing your point overlaps

Also, instead of table data returned you can get a graph by using a URL like this:

http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Holt%2C+Whiskey+Slough&units=f&type=graph&gx=640

append "&type=graph&gx=640" to the end of the url to get the graph.

and you can suppress the bottom area of the page by adding:
&killwarn=ZVmCjBZF&cleanout=ZVmCjBZF