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  1. Lake Spillway Leak Repaired with Polyurethane Injection

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    Water was leaking out of this lake because it was flowing under the spillway instead of over it.  Polyurethane grout injection was used to remedy the situation.  Holes were drilled on the face deep enough to reach the backside of the spillway.  Mechanical packers were then placed in the hole.  The installed packers are now an injection port to hook up to the grout pump, which pumps the polyurethane to the back side of the spillway.  The grout used was Hyperflex, a moisture activated polyurethane.  Once in contact with the water, it foams to fill the voids and seal the leak paths.  Hyperflex is NSF/ANSI/CAN 61 approved for contact with potable water and is manufactured by SealGuard, Inc.  The grouting was performed by Sub-Technical, Inc.

     

    spillway repair with polyurethane injection

  2. SealGuard II Polyurethane Grout Injection to Stop Water

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    The seam on this dam tunnel was actively leaking water.  SealGuard II, a dual component polyurethane grout, was injected into the leak path to seal the water flow.  With just a drill, a dual component caulking gun, and some SealGuard II, a water leak of up to 50 gallons per minute can be stopped.  SealGuard II is manufactured by SealGuard, Inc. and the grouting was performed by Sub-Technical, Inc.

  3. Earthen Dam Repair

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    Earthen dams losing water can be injected with polyurethane grout to seal the leak paths.  Here holes were drilled along the crest of the dam which enabled lances to be inserted.  The lances were then hooked up to a pump and injected with Hyperflex.  Hyperflex is a single component polyurethane grout that is moisture activated.  Hyperflex is also NSF/ANSI/CAN 61 approved for contact with potable water.  This method is less invasive and more cost effective than tradition repair methods.  Grouting was performed by grouting contractor Sub-Technical, Inc.

  4. Creek Draining into Abandoned Mine Creating AMD

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    This dry creek bed was created by the water draining into an abandoned mine below.  Not only was this creating a dried-up creek, but the water also leaving the mine at another location was creating acid mine drainage.  To prevent the water from entering the mine, the creek bed was injected with polyurethane grout.  The grout, Hyperflex, sealed off the leak paths and will help keep the water on the surface.  Hyperflex is a single component, moisture activated material that is NSF/ANSI/CAN 61 approved for potable water.  Hyperflex is manufactured by SealGuard, Inc. and was installed by grouting contractor Sub-Technical, Inc.