During a routine ROV inspection performed by a contractor, it was discovered that a head gate seal plate had fallen off. Upon further inspection, it was discovered that the attachment hardware had corroded to the point of failure on the other intake slots as well. This was most likely due [...]
In November 2020, Underwater Construction Corporation (UCC) was contracted by a hydroelectric utility to conduct repairs to a dam’s stilling basin. Previous inspections had identified areas of spalling and exposed concrete reinforcement. Additionally, a section of baffle blocks had become dislodged and swept downstream during a high-water event. To [...]
During the winter of 2012 UCC Midwest Division was contracted to perform a deep water diving inspection for a hydroelectric facility in the Northern Midwest. One of UCC’s double lock chambers and deep water diving oversight was provided onsite to increase the safety of the dive. Multiple dives were required [...]
Clay Lined Water Reservoir Grout Injection to Seal Large Fissures (Water Power Project – applicable to any industry with water retaining structure) The clay liner of an 842 acre reservoir supporting a 1872 megawatt pump storage facility developed large trench-like features. Reservoir depth ranged from 40 feet to 110 feet. Before [...]
Concrete gravity Dam Underwater Concrete Placement (Water Power Project – applicable to any industry with concrete water retaining structure) A concrete gravity dam with an earth core and rock/soil foundation was completed in 1944. The dam is 8,422 feet long, 206 feet high with a 130 foot head. Maximum storage is [...]
In the summer of 2011 the UCC Midwest Division completed a turnkey project for a hydroelectric facility in Wisconsin. The project work scope included the removal and replacement of the facility’s existing log boom and fish barrier net and installing a new 280 foot system designed to incorporate the barrier [...]
