Pacific Gas and Electric magazine . ^L^-i -^i-y,-:if. Sluicing for gold where the moHitor does its work shaped concrete blocks—built in place alter-nately—containing not less than 400 cubicyards each—and similar to the dam built byme in San Mateo County, where it forms thelarge Crystal Springs Reservoir of the SpringValley Water Company. This same methodwas successfully employed in the constructionof the large Barren-Jack dam in Australia. The successful manner in which the abovemain Crystal Springs concrete dam resistedthe tremendous wrenching to which it wassubjected by the earthquake of Apr
Pacific Gas and Electric magazine . ^L^-i -^i-y,-:if. Sluicing for gold where the moHitor does its work shaped concrete blocks—built in place alter-nately—containing not less than 400 cubicyards each—and similar to the dam built byme in San Mateo County, where it forms thelarge Crystal Springs Reservoir of the SpringValley Water Company. This same methodwas successfully employed in the constructionof the large Barren-Jack dam in Australia. The successful manner in which the abovemain Crystal Springs concrete dam resistedthe tremendous wrenching to which it wassubjected by the earthquake of April 18th,1906—although located close to the mainfault-line—fully proved that the method ofconstruction adopted by me, coupled with thefirst-class materials and thorough workman-ship employed in its erection, fully justifiedthe great care bestowed upon every portionof this important work. The rock required for the concrete for thenew Lake Spaulding dam—estimated at be-tween 250,000 and 300,000 cubic yards ofconcrete—will be quarried out
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