It's been pulled from that URL unfortunately. There's a few copies floating around if you google the filename unfortunately they don't come from as authoritative a URL as the .gov address you provided.
Shouldn't it remain readily available to at least the citizens of the US? If nowhere else, via the Library of Congress? An initial search didn't turn up that report (as far as I can tell, at a glance, there's a couple of funding documents authored by Feinstein at least) -- but there's a rather depressing list of other documents:
(39 pages, some interesting points are made, among them some pretty clear arguments that torture is illegal, and harsh techniques that for some reason or other are deemed to not be torture may also be illegal...)
https://www.loc.gov/search/?q="Committee+Study+of+the+Centra...
Like the older:
United States Senate Committee on the Judiciary Hearing June 10, 2008
"Coercive Interrogation Techniques: Do They Work, Are They Reliable, and What Did the FBI Know About Them?"
https://www.loc.gov/rr/frd/Military_Law/pdf/Senate-Judiciary...
(39 pages, some interesting points are made, among them some pretty clear arguments that torture is illegal, and harsh techniques that for some reason or other are deemed to not be torture may also be illegal...)