A New Earthquake-Proof Calaveras Dam - KQED QUEST
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- Опубліковано 26 лис 2015
- The San Francisco Public Utilities Commission has been hard at work to replace and upgrade aging infrastructure and reservoirs that make up the 80-year-old Hetch Hetchy water system. The most expensive and biggest of the jobs is replacing a 90-year-old earth and rock-filled Calaveras dam.
For more on the Hetch Hetchy Project, watch our QUEST story:
• Hetch Hetchy Aqueduct:... - Наука та технологія
