That would be the US Bureau of Reclamation. There was once a public info specialist (Kara) who posted to the Buzz with all kinds of information but she left the BOR a couple of years ago for another agency. I tried to get in contact with her successor to continue communication with the "recreational boater stakeholder group" but to no avail.
Here's the info from Kara's signature line, don't know where the phone number will lead you:
Eastern Colorado Office
Bureau of Reclamation
Not sure who owns the easement at the takeout.
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse