Unbuilding the Grace and Pearman Bridges


For Sparky and myself, curiosity drives passion which in turn fuels our life's engine. Our passion was capturing the story of both unbuilding the Grace (1929 - 2007) and Pearman (1966 - 2007) Bridges and discovering the unbuilders. It takes a lot of passion to track a project from July 2005 until April 2007 - rain, shine, hurricanes or moving to Singapore. We discovered the joy of discovery learning. Ken Canty opened the front door for us - then Steve Testa, Ponch Billingsley and Mickey Rogers opened many side doors. Below are the highlights of what we discovered, who we met and what we learned.

And a reminder from T.S. Eliot (East Coker from the Four Quartets)

Home is where one starts from. As we grow older
The world becomes stranger, the pattern more complicated
Of dead and living. Not the intense moment
Isolated, with no before and after,
But a lifetime burning in every moment
And not the lifetime of one man only
But of old stones that cannot be deciphered.

January 12, 2007: Mickey and Ken at their best, T-1 unbuilt

Friday is a good day - and look what Mickey and his team did.

The worksite: T-1, Container barrier to the right and leftover Grace and Pearman bones in the foreground

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and team - Mickey, Ken, Paul, Carlos, Randy and a video crew

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Manny's elevator

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Carlos with the transmitter and Mickey's tripod. Behind, Mickey and his mobile phone - calling Singapore?

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Ken doing the tie in of the shock tube array to the receiver - Mickey and Ken typically use Nonel detonators

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Mickey: Advanced Blasting Services and Carlos: Advanced Ironworker Acrobats

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The video team from the Discovery Channel

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Unsung heros - Manny and Stan

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Hollywood at the port

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Pre-blast Discovery interview - Chris Starr would call this Discovery Learning

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Ken

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Manny's elevator on the way up

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to the top floor

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Hmmm - Mickey has some new caps - where is mine???

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Wow - a room with a view

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Mickey's setup on the top of T-2

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Randy and Carlos looking up from the best seat in the house: atop T-2. Mickey is fiddling around with something (right) next to the transmitter

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and a great view of the Ravenel Bridge

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A view of the worksite from above

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The Discovery Channel professionals- they wear dark shirts!

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The worksite from above

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another view of the worksite: T-1, shock wave absorbers to the right

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Mickey and his D-70 on the Manfrotto tripod. Hey Mickey - I passed my D-70 to my daughter, got a D-200 that takes 5 frames/sec of high res. for your next blast. In the meantime, I have graduated from unbuilding to Singapore insects. Clearly I need to improve my focus - but watch out, I'm catching up.

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Manny

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and another view of the Ravenel

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Just before the blast - the incoming port traffic is stopped

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Click image for full display of ignition.
Here is a frame by frame illustration of the ignition and detonation sequence. Before (left) and initial shock tube ignition (right)

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T = 66 msec          T = 100 msec

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T = 133 msec          T = 166 msec

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T = 200 msec          Note the shock tube track from the columns to the cross member T = 233 msec

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T = 266 msec          T = 300 msec

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T = 333 msec          T = 366 msec

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T = 400 msec         Note detonation at the base of each column T = 433 msec

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T = 466 msec          T = 500 msec

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T = 533 msec          T = 566 msec

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T = 600 msec          T = 633 msec

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T = 666 msec          T = 700 msec

jan_12_t1_frame_320.jpg jan_12_t1_frame_321.jpg

T = 733 msec          T = 766 msec

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T = 800 msec          T = 833 msec

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T = 866 msec          T = 900 msec

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T = 933 msec          T = 966 msec

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T = 1000 msec          T = 1033 msec

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T = 1066 msec          T = 1100 msec

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T = 1133 msec          T = 1166 msec

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T = 1200 msec          T = 1233 msec

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T = 1266 msec          T = 1300 msec

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Sparky, was able to catch the action from Manny's elevator - and what a view. Initial ignition and blast - note the position of the cargo shock absorbers

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Here is a high resolution image of the shock tube ignition (crawling up the left column)

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Here is the frame by frame view of ignition and detonation. Note Then detonation

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Here is a high resolution of the initial detonation. Note that Mickey set charges only in the middle of the pier cap. More important - compare the lateral spread of debris on the left and right. The left side was not wrapped in chain link fence while the right side was. You can clearly see that the fence did a remarkable job of contrining the lateral distribution of the right sided implosion. Nice work, indeed!!!

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The stacked shipping containers - configured as shock wave absorbers are doing their job - slowly tilting

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absorbing the shock wave from the base

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and the collapse continues

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All over - shock absorbers did their job containing the lateral shock wave

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Sparky got a really great shot of the top of the Grace pier

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No more T-1

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The shock absorbers from the ground

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Looking back

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and no sooner was everyone down than clean up started - Michael and team

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The camera crew

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and looking back from the SeaBreeze parking lot

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Creative Commons License
This work is licensed under a Creative Commons License.

C. Frank Starmer

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