1999 – The Center and two other conservation groups filed a lawsuit against the U.S. Army Corps of Engineers to stop construction on the Seven Oaks Dam on the Santa Ana River.
2000 – In the same year in which the fish was declared threatened under the Endangered Species Act, a Center lawsuit resulted in a court order compelling the U.S. Fish and Wildlife Service to map out and protect critical habitat for the Santa Ana sucker within a year.
2001 – In response to the Center’s Seven Oaks Dam lawsuit, the Army Corps agreed to review the impacts of the dam on endangered species, including the Santa Ana sucker. The agency is still in the process of devising a Multiple Species Habitat Management Plan to minimize and mitigate the dam’s effects.
February 26, 2003 – The Center secured a court order requiring the Service to designate and protect critical habitat for the Santa Ana sucker within the Los Angeles basin by the following year. Until the designation was complete, the court forbade the agency from approving any projects that would have harmed the sucker’s habitat in the Santa Clara, San Gabriel and Santa Ana rivers and Big Tujunga Creek.
November 15, 2007 – The Center filed suit against the Service challenging the decision to slash the Santa Ana sucker’s critical habitat.
December 8, 2009 – As a result of our lawsuit, the Service proposed to protect a total of 9,605 acres, including the fish’s namesake river, the Santa Ana.
December 2, 2010 – The Service finalized a critical habitat designation of 9,331 acres for the Santa Ana sucker.
November 22, 2011 – Four conservation groups — the Center for Biological Diversity, Sierra Club, San Bernardino Valley Audubon Society and California Trout — sought to formally intervene in a lawsuit filed by a dozen Southern California water agencies and towns against the Fish and Wildlife Service’s designation of habitat protections for the Santa Ana sucker.
October 23, 2012 – A federal judge upheld the critical habitat protections designated for the fish in 2010.
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