Walnut Creek, CA 2013
Partial Canal Dewatering

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This strainer basket was essential to keep out the algae clumps endemic to the canal. Walnut Creek, CA 2013
AquaDam continues to fill. Walnut Creek, CA 2013
The majority of the AquaDam remains rolled up, while the unrolled portion fills and forms a head above the surrounding water. Walnut Creek, CA 2013
Single tube is inflating, causing the water to back up enough that the smaller sump can draw and fill the water-side tube. Walnut Creek, CA 2013
Both tubes are roughly evenly filled, and the head pressure is beginning to unroll the AquaDam. Walnut Creek, CA 2013
A pleat of AquaDam is made on the inside, causing the roll to spin, forming a turn. Walnut Creek, CA 2013
Upstream water is backing up and rising, keeping pace with the AquaDam fill-rate. Walnut Creek, CA 2013
Sandbags are placed as backup support to the AquaDam while it is filling. Walnut Creek, CA 2013
The drill point surrounded by sandbags is ~11' from the wall. The 30" tall AquaDam will be ~5' wide when full. A buffer between the AquaDam and the drill area leaves ~30" of channel width for the flow of the channel to pass through. Walnut Creek, CA 2013
The AquaDam continues to fill, creating a head above the surrounding water. Walnut Creek, CA 2013
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