Abstract
Observations
Ocean and Coastal Consultants Inc (now merged into what is known as COWI A/S) and Fathom Solutions loaded gear onto the Patriot Too. The crew left the dock in Falmouth at 0630 and arrived the work site at 0755. Upon arrival at the work site, the crew proceeded to anchor the vessel in position for the installation using a two point mooring with the stern tied-off to the Southeast pile and an anchor set off the bow. Fathom Solutions set-up the dive station and hydraulic equipment while OCC set-up the ROV equipment.
At approximately 1000, after donning dive gear, Fathom Solutions divers (2) entered the water and scoped out the work location.
The Fathom divers then proceeded to install the four (4) new mats at the seabed surrounding the Southeast pile.
Conclusions:
The measurements indicate a net accretion of twelve inches at the Southwest pile and a net scour of seven inches at the Southeast pile. The findings indicate, that despite the condition of the mat on the Southwest pile, the existing mats appear to be helping to prevent scour at this location.
Recommendations:
Continue monitoring of the seabed and mat conditions. A follow-up investigation should be undertaken in spring of 2007.
Attachments:
Photographs
SSCS Installation Drawing
Tide Graph for 25 May 2006
Current Graph for 25 May 2006