The closed chapters at U of I are:
Alpha Xi Delta (1905-? and 1983-1990ish)
Alpha Sigma Alpha (1982-1992)
Delta Phi Epsilon (1927-1988)
Zeta Tau Alpha (1921-1988)
Theta Phi Alpha (1919-1953)
Sigma Sigma Sigma (1957-1987)
The only NPC to never have a chapter at U of I is Alpha Sigma Tau.
The 2 struggling groups are NPCs. PM me if you must know. One of them has struggled at least since the late 1980s when I was there, and has a fractional number of members compared to the other NPCs. The other struggling group has not struggled long-term like the other.
ZTA has a lovely house on campus that is presently occupied by a fraternity.
http://www.illiniifc.com/page.php?pa...er_tour_id=156 DPE was also there when I was but I don't know if they owned their house. It was very small compared to the other properties. Alpha Xi Delta was also there when I was and also had a somewhat smaller house, but very nice. I don't know if they own it. Alpha Sigma Alpha was there when I was, but they had a regular residential house that was pretty far from the others. Again, I don't know if they owned that property. They were a very small chapter compared to the others.
FYI, in my opinion, a group would have to have/get a nice, large house in order to be competitive. Delta Zeta recolonized when I was there and it went very smoothly for them. A constant issue at U of I is local alumnae support. Because the chapters tend to be extremely old, they have tons of alumnae, but not necessarily in C-U, which is in rural Illinois.