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- January 29, 1924
Snow storm blankets Alameda County.
By this year, Castro Valley was ranked 2nd in the world in egg and hatchery production. Estimated population: 800,000 hens and 5,000 people.
- January 15, 1927
Original Dumbarton Bridge opens. Bridge is later rebuilt to alleviate traffic and safety concerns.
- September 1927
Oakland Airport (present North Field) is dedicated. Charles Lindbergh presides.
- June 28, 1927
First Transoceanic Flight Leaves Oakland.