Tuesday, March 13, 2012

Boom Goes the Dynamite!

Well, technically the “Boom” is not as loud as one would imagine. The Calaveras Dam Replacement Project has begun controlled detonation activity to produce the hard rock required for construction of the dam. Due to the existing conditions of the rock, we must use controlled detonation to break down the surface. Prior to each blast, numerous steps are taken for safety and extensive watering of the blast area is done to ensure dust emissions are kept to a minimum. Pre-construction surveys are also performed prior to each blast for removal of any special species.

For the first initial blast, it took four days to drill 76 holes to place the explosives. Over 10 tons of explosives were used, blasting a total of 16,000 cubic yards of material, to be used for dam construction.

Controlled detonations only occur at the Calaveras Dam project site within SFPUC property. Detonations will continue intermittently through the end of the project in early 2015, only during daytime hours, Monday through Friday.

For more project info, contact us at our 24 hour answer line at (866) 973-1476 or email mle@sfwater.org

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