After 60 years, the design flood for the Bluestone dam changed requiring a modest raise and a number of other improvements totaling some $130 million thus far and another estimated $200 million in improvements still to go. Check out the size of these anchors being use to anchor the dam foundation into bedrock. This is just one of 150 anchors. The article also discussed how the rock strength parameters used to design the dam 60 years ago were developed using the state of the practice at the time, new rock strength parameters are lower using current design standards. [Source: The Charleston Gazette. Image: Charleston Gazette]
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From ENR:
The San Diego County Water Authority board of directors last week certified the environmental impact report to raise San Vicente Dam by 117 ft.
The $568-million project, to be built on top of the existing San Vicente Dam in Lakeside, will expand the reservoir to hold an additional 52,000 acre-ft of water for use during emergencies and another 100,000 acre-ft of water to supplement imported supplies during dry periods.
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