1992 – The Bonneville Chapter of the American Fisheries Society and the Southern Utah Wilderness Alliance petitioned for Endangered Species Act protection for the Virgin River spinedace.
1994 – The U.S. Fish and Wildlife Service proposed to list the spinedace as threatened under the Act.
1995 – The Service proposed to designate 126 river miles of critical habitat to protect the spinedace.
1996 – After the development of the Virgin River Spinedace Conservation Agreement and Strategy, the Service withdrew the proposed listing and critical habitat.
2011 – The Center submitted comments opposing the Ash Creek Reservoir and Pipeline Project, which would destroy spinedace habitat in Ash Creek and decrease flows to the Virgin River.
November 20, 2012 – The Center petitioned for Endangered Species Act protection for the spinedace.