History of California

O'Shonessy to'g'oni
1922 yil avgustda to'g'on qurilishi ©Image Attribution forthcoming. Image belongs to the respective owner(s).
1923 Jan 1

O'Shonessy to'g'oni

Tuolumne County, California, U
1923 yilda Tuolumne daryosida O'Shaughnessy to'g'oni qurib bitkazildi va butun vodiyni Hetch Hetchy suv ombori ostidagi suv bosdi.To'g'on va suv ombori Hetch Hetchy loyihasining markaziy qismi bo'lib, u 1934 yilda suvni San-Fransiskoga va uning katta San-Fransisko ko'rfazi hududidagi mijoz munitsipalitetlariga 167 milya (269 km) g'arbga etkazib bera boshladi.

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