16ft AquaDam, Water Intake Isolation Phase 2, Stanislaus River, Sonora, CA 2013 скачать в хорошем качестве

16ft AquaDam, Water Intake Isolation Phase 2, Stanislaus River, Sonora, CA 2013

Phase 1 of this project was documented here: Phase 1 16'x320' AquaDam Attempt 1: Streambed Sealing Skirt Installation: Phase 1 16'x320' Attempt 2 (replacement dam): After the new water intake was constructed and put into operation, it was time to demolish/remove the old (100+ years) water intake structure, nearest the overflow weir. The plan was to deploy the 16ft tall, 320' long AquaDam, starting from the overflow weir, deploying the dam upstream, then turning it to abut the bank. However, this didn't work out very well. The partially unrolled, but not yet filled, AquaDam was floated into position at the upstream edge of the overflow weir. But, the water caught the dam and pulled it over the edge of the weir. Once that happened, it was all over. Water running over the dam got caught between the multiple woven layers of the outer sleeve, forming a large bubble of water at the downstream end of the AquaDam. This end of the dam had to be cut to release this water, before it could be pulled back over the weir, upstream to the bank. With the end cut, the only deployment option was to start from the upstream bank, and deploy downstream toward the weir. This was initially avoided due to the difficulty of judging AquaDam length compared to required length. If too short, the work area would not be isolated. If too long, the dam would unroll over the overflow weir, and "hang" on the downstream side. However, the skill of the contractors crew, and the ADI rep, led to a successful shore-to-weir deployment of the 16'x320' long AquaDam.