1913 - Rupert electric high school built
1913 - Rupert police department organized
1913 - Legislature passed bill creating Minidoka County
1914 - Rupert electric high school opens
1914 - World War I begins
1914 - Heyburn is first Idaho State basketball champs
1916 - Project Mutual Telephone Cooperative Association is organized
1916-17 - Courthouse built
1917 - The Amalgamated Sugar Co. Paul factory opens
1918 - First burial in Paul cemetery
1919 - Minidoka County quarantined for Spanish flu
1920 - Wilson Theatre opens
1920 - First woman pilot to receive license, Aero Club of America, Mrs. Volera Eomanza Nelson.
1920 - Minidoka Bank (city) was chartered in 1920 with D.L. Evans, Pres. Bank moved to Paul in 1926. It was the only bank in the county to weather the Great Depression.
1925 - First hospital, Dr. Leland Frazier
1927 - Rupert Cemetery moved to MAR Cemetery
1927 - Verberg Bridge (toll) built between Burley and Heyburn replaces 1907 version
1929 - First talking picture show at Wilson Theatre "The Singing Fool"
1929 - Stock market crashes
1931 - 11-ton jackrabbit drive three miles north of Rupert
1934 - Earthquake damages Pioneer School
1932 - Last settler leaves the failed dry farms of Kimama -Minidoka where the land returned to sage and homes either fell to ruin or were burned.
1936 - New high school built in Acequia
1938 - CCCs arrive at Paul and Minidoka Dam.
1944 - Camp Rupert, Prisoner of War Camp, Italian, and German POWs opens
1946 - Minidoka County Sheriff's posse organized
1947 - Julian Clawson of Rupert discovers vast reservoir of underground water beneath Minidoka County, effectively beginning pump-based irrigation on the Snake River Plain.
1948 - 17 school districts consolidate into one
1949 - Clawson's deep-well irrigation in Minidoka County opens up 30,000 acres of private land development, plus more than 60,000 acres of public land by 1960.
1950 - Edgar Rice Burroughs, author of “Tarzan” stories dies.
1952 - The U.S. Senate presented the act for Rev. James R. Crowe, a local Methodist minister to buy land for the Idaho Youth Ranch.
1953 - GI homestead lotteries begin
1956 - J.R. Simplot breaks ground on Heyburn plant
1955-56 - Minico High School opens, thee high schools consolidated
1955 - Overland Bridge constructed, concrete and steel
1958 - Wilson Labor Camp organized
1958 - A.C. DeMary presents DeMary Memorial Library to the city of Rupert
1961 - Minidoka Memorial Hospital built
1965 - The Arvon Theatre in Paul closes
1974 - 129-day strike by grain millers' union partially shuts down Simplot's Heyburn plant.
1974 - Interstates 84 and 86 are completed in southern Idaho, drying up traffic and business along the old U.S. 30 corridor between Heyburn and Bliss.
1977 - Most severe drought since 1930s batters farm income.
1977 - Arson fire destroys Paul Elementary School
1978 - Minidoka County Historical Society Museum established
1989 - Burned and dismembered infant found in Minidoka landfill sparks years of national Baby X Satanic worship debate
1993 - Rupert Chamber of Commerce and Burley Chamber of Commerce merge into Mini-Cassia Chamber of Commerce
1998 - Mini-Cassia Chamber of Commerce builds on northeast corner of Burley-Heyburn Bridge
1997 - Simplot lays off half its work force in Heyburn citing a soft fast-food market and recession in Asia.
1997 - Snake River floods damage homes and property on both sides of the river
2000 - Heyburn opens new Heyburn Riverside RV Park
2001 - New Overland Bridge dedicated
2002 - Rupert's business district becomes National Historic District
2003 - J.R. Simplot Company Heyburn plant closes
2004 - City of Minidoka incorporates
2006 - Rupert's centennial birthday
2007 - Acequia’s centennial birthday
2007 - Kraft Foods closes Rupert plant
2008 - Renova Energy Idaho LLC files for bankruptcy leaving taxpayers and local businesses on the hook for unpaid work
2008 - Heyburn officials annex property to stop Burley officials from using eminent domain to acquire land for an airport
2008 - New Rupert pool opens
2009 - Minidoka County School District opens new Heyburn and Acequia elementary schools
2009 - Demolition on Jackson Bridge begins, portions of the bridge used in the Burley greenbelt walking path and at Riverside RV Park walking paths
2010 - Paul creates Paul Community Park
2012 - U.S. Bureau of Reclamation and South Central Public Health both choose Heyburn locations for offices to serve people in Cassia and Minidoka counties.
2012 - Double L Manufacturing opens on new 69-acre Magic Valley Business Park in Heyburn. The park was Heyburn Urban Renewal Agency's first project.
Thanks to Minidoka County Centennial Committee Chairman Gary Schorzman for his work in establishing the timeline.