Action timeline

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.

March 19, 2002 – The Center and allies sued the Service after the agency failed to comply with the 2000 court order to designate critical habitat for the Santa Ana sucker.

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.

January 4, 2005 – Though the Service had designated 21,000 acres of critical habitat for the Santa Ana sucker in February 2004, the agency slashed protections to just 8,305 acres — none of it within the Santa Ana basin.

November 15, 2007 – The Center filed suit against the Service challenging the decision to slash the Santa Ana sucker’s critical habitat.