Keystone Dam – Leaking Penstock Repairs

Owner: US Army Corps of Engineers

System: Urethane Injection

Completed: 2003


The joints within the penstocks of the dam were leaking.  We mobilized, under unique conditions, to address the problem.  We drilled holes through the interior of the penstock to intersect the leaking joint and pressure injected urethane resin to seal the interior of the joint.