Changing the face of Charleston : The unbuilding of the Grace and Pearman Bridges
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Unbuilding Highlights
(Apr 10)
Meeting St. Stories
(Jul 10 2006)
East Bay Stories
(Oct 10 2006)
Drum Island Stories
(Feb 17)
Pearman Bridge Stories
(Apr 3)
Grace Bridge Stories
(Apr 3)
Imposions: Prep and boom
(Mar 27)
Unbuilding Bridge Blog
(July 23 2006)
Unbuilding Challenges
(Mar 13)
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(Feb 20)
Unbuilding Stories
(Mar 13)
Video and Sounds
(Feb 28)

September 29, 2005: Test blast on Drum Island
Sparky and Mickey Rogers came to the rescue while I was at NIH

Here is the before image. Look carefully at the support with the vertical column of holes - that contains the explosive charge

Better shown here

and from a different vantage point (before)

The blast (from Mickey who works for Advanced Blasting Services). Note that the blast started at the bottom of the columns and was timed to work its way up the column. Click for a video (Windows Media Video format) or Click for a video (1 Mb mpg)

and from Sparky

The smoke

more smoke

more smoke

and as the smoke settles -

and now - just another cloud

After the blast - just pieces

Another view - and my assessment is that the blasting guys represent another surgical specialty within the Cashman/Testa team.

And of course - cleanup at the bottom

and cleanup at the top

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Attribution: C. Frank Starmer and Sparky Witte from