Pond Boss Forums POND CONSTRUCTION Selecting a site "pondering" a pond site

I'm west central, Greencastle area.
The 20 ft dam height is a state thing. It's the point where you transition from a private to state monitored and regulated dam in Indiana.
The 1 ft contour lines are a bit difficult to see in the map I posted. The way I understand the rules, is that a dam's height is measured from the lowest point of the creekbed at the centerline of the dam.
In the case of my map, the dam midline crosses the ravine creekbed at the 787ft contour (804 ft pond surface -17 ft depth) So I was really pushing the limit with a 20ft dam (17ft depth plus 3 ft freeboard). I'd shoot for 6 inches lower to stay under the state radar.
This shows the the 804 and 787 lines:


As far as watershed, this is close but not totally accurate, as I had to move my dam upstream a bit, (I had to back off my original 810 ft level with about 2 surface acres.) since this watershed calc. was run. The new shed is probably a couple acres smaller, maybe 27 total instead of the stated 28.2:


I've read a little about dam construction so far, but not really focused on it yet.