501 Engineering is committed to providing the limnological research community with a high-quality and unique vehicle with which to assist in lake studies.  The 501 Flow was developed by Johnny Melack, founder of 501 Engineering, with assistance from world renowned research scientists Sally MacIntyre, Ph. D and Geoff Schladow, Ph. D. 
Johnny and Sally studying hydro- dynamics at Toolik Lake, AK.
501 Engineering Contact Info:
Johnny Melack
(530) 848-4970