Deutsche Bank's Cosmopolitan Resort & Casino complex in Las Vegas, already the most expensive debacle in the city for a single lender, is now two years behind schedule, $2bn over budget and under water - literally.

Deutsche Bank, the resort’s owner since it foreclosed on developer Ian Bruce Eichner last year, requires 24-hour pumps and containment walls after workers hit an aquifer below the Nevada desert floor. It’s another challenge for a project whose delays and redesigns have sparked lawsuits from condominium buyers and sales agents amid record declines in Las Vegas’s gambling revenue, home prices and hotel-room bookings.