Step 4-Moving Rocks and Debris:

When installing an AquaDam®, you must not only remove rocks from it’s path to ensure a good seal, you must remove all debris. Sharp, angular objects are often located under the water level, and usually the only way to find them is to walk around in the water until you step on them. Not only will these obstructions cause a greater amount of leakage, there is always the possibility that they may cause damage to the AquaDam®. Never take it for granted that your work area is free from debris! ALWAYS CHECK FIRST!

THIS IS YOUR ENEMY…

Step 5-Restraining Ropes:

Large AquaDams®

AquaDams® that are four or more feet in height in live streams commonly require restraining ropes to restrain the unrolled portion of the AquaDam® during the installation process. Without these lines or ropes the pressure of the water in the inner tubes would cause the AquaDam® to unroll before the proper inside head pressure is achieved. Preventing this pressure from prematurely unrolling the AquaDam® is very important. The pressure of the water mass inside the AquaDam® has to overpower the pressure of the water on the upstream side (compared to the downstream side). In lake water, the pressure will be the same on both sides of the AquaDam® (until dewatering begins by pumping).

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