You can download pkepadat.zip from:
ftp://ftp.nps.gov/pub/design/hydana/
(National Park Service)

It is about a year old version. I made some minor changes to it since and I could e-mail it to your address as an attached file (assuming that you can download it). I don't think that the owner of the list would like it if I posted these large files to the list.

There is also:
pkhs.zip (a pressure, gravity pipe, open channel hydraulic program)
pkpump.zip (pump selection program)

I made some changes to those also. The graphs are black on white now.

Istvan