Divers from Global Diving and Salvage have begun work to replace two drainage valves in California’s Lake Gregory, according to Mountain News.
The work involves descending more than 55 feet into the dark and murky waters behind the dam, the newspaper says. “Working from a barge anchored in place maybe 40 feet from the shoreline, the team of two divers began removing a trash gate at the tunnel entrance made up of steel bars at the entrance designed to keep big pieces of trash from entering the four-foot in diameter tunnel.”
The diver work, installing two temporary plugs, hydroblasting and installing new 30-inch pipe are part of a $1.4 million contract awarded to Pro-Craft Construction of Redlands. Global Diving and Salvage is working under that contract, Mountain News says.
The dam is owned by the County of San Bernadino. The county has budgeted about $12.8 million to pay for the work to install new drainage valves and strengthen the dam, the story says.
The complete story, with more details on the work being performed, is available here.
For more news on underwater work at dams and hydro facilities, click here.