Colorado River Research Chronology

1854

1868

1887

1891

1899

1900

1902

1905

1908

1916

1920

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1933

1935

1937

1938

1939

1940

1942

1943

1944

1945

1946

1947

1948

1949

1950

1951

1952

1953

1954

1955

1956

1957

1958

1959

1960

1961

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

Undated

Statute

Archives