I know this subject is over a year old but with all the rain it remains current.
I posted that July 10, 2010 the water level was 8'-4" below the box culvert on the Oldham grade. Today July 22, 2010 the water level was 7'-6" below the grade up 10" in 12 days and water continues to run into the North end of the lake.
The culverts south of the grade are 54" dia. and the water level is 13" below the top of the culverts.
Since this post started in March of 2009 the lake has come up 6 1/2'.