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SFPUC says Calaveras Dam construction progressing but geologic findings raise cost and schedule risks
Summary
The Water System Improvement Program is largely on schedule, but new geologic jointing discovered in a borrow area for the Calaveras Dam replacement will require additional excavation support, rock bolts and shotcrete, adding cost and schedule risk; staff will bring mitigation options at the December quarterly report.
At Friday’s San Francisco Public Utilities Commission meeting staff said the Calaveras Dam Replacement Project is more than 70% complete in construction but faces new geologic challenges that could increase costs and require schedule mitigation.
Dan Wade, Water System Improvement Program director, told commissioners that crews have initiated mining in the Bar Area B hard‑rock quarry and completed 14 of 16 borings. Tests showed pervasive jointing in the rock that is locally…
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