31.07.2013 Views

The Alaska Contractor - Spring 2011 - Keep Trees

The Alaska Contractor - Spring 2011 - Keep Trees

The Alaska Contractor - Spring 2011 - Keep Trees

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

SEWARD BREAKWATER EXTENSION<br />

In March 2010, WCC also began a $4.8 million project to<br />

shore up and extend the breakwater in Seward.<br />

“We had to take the nose off the existing breakwater and<br />

then tie into place the material. This was all constructed from<br />

barges because you couldn’t get to the site,” said West.<br />

photos: the al asKa sealife Center, universit y of al asKa anChor aGe and miCro speCialties inC.<br />

• 09.22.10 - <strong>The</strong> breakwater extension “breaks” the water line.<br />

• 10.28.10 - Excavator and barge placing rock on the breakwater extension.<br />

• 10.30.10 - First connection of the new extension with the existing breakwater.<br />

• 11.10.10 - Continued work with excavators and barge on the new breakwater extension.<br />

• 12.02.10 - Completed seamless extension of the breakwater.<br />

Marine construction in tough environments is what WCC<br />

is known for, but properly placing fi ll with an excavator from<br />

a fl oating barge is still no easy task.<br />

“We have a GPS system on our excavator so we always<br />

know exactly where the bucket is,” West said, but nonetheless<br />

the job proved diffi cult because the tolerances were<br />

extremely tight.<br />

“We were setting four-foot stone and the tolerance on<br />

the fi nished rock surface of the breakwater was minus zero<br />

plus six inches, so trying to fi t irregularly shaped 4-foot<br />

stones into that exact shape was a challenge,” West said.<br />

<strong>The</strong> project was completed in November 2010, and WCC<br />

worked with Brice Companies for the tug and barge, and<br />

TerraSond Limited provided surveying services.<br />

<strong>Spring</strong> <strong>2011</strong> <strong>The</strong> <strong>Alaska</strong> conTrAcTor 21

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!