Dewatering for Pipeline Installation
Williams Transco Gas
Machias, WA (2003)
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Several hundred linear feet of 4' and 3' high AquaDams® were needed to block water flow through a swamp so a new gas pipeline could be installed in a dry environment. The surrounding landscape was very flat which made it difficult to find an elevated place to start the AquaDams®.
Machias, WA
 The AquaDam® had to be pulled back into the tree line and tied off to hold it in place. Also the deepest water depth was in the middle of the swamp, which meant that larger AquaDams® had to be used than originally anticipated. Fortunately, the AquaDam® crew came prepared with extra material.
Machias, WA
The AquaDams® have reached the deep portion of the swamp. Since no equipment would be allowed until after dewatering and access could only be had from one side, each unit was pulled off of the trailer and floated to the site with nothing but manpower.
Machias, WA
A view of the completed installation. Notice that the water level on the dewatered side has been greatly decreased by pumping water into the AquaDams®.
Machias, WA
A view from the other side of the swamp. The last several hundred feet is composed of a single extra-long 3' high AquaDam®. Notice the sticks and brush on the right; great care was taken to ensure that all branches and other sharp objects (barbed wire fence) were removed so as not to damage the AquaDams®.
Machias, WA