Hi Slim,
Are you not geting the regular updates from Resortalia? About 2 months ago they started sending out fornightyly'ish updates on progress of housekeeping around the resort. Here's an extract from this week about the lakes
*As we  informed you in previous weeks, the works at the lake are in progress. As you  can see at the pictures below, the water from the left hand side of the lake has  been transferred to the compartment which is going to be use by the golf course  and it is now nearly full of water. The level of the water on the left hand side  of the lake is now low enough to start the works and built the second dike,  which will divide the lake in two more compartments. First dike already built. It separates  the area with the water for the golf course from the central  compartment. This is the  biggest area placed in the middle of the lake. The level of the water is so low  to allow building the second dike. Before it is fill again it will be properly  cleaned. This is the  left hand side part of the lake (more secluded area of the Island), which will  be used as a reservoir of the Community once the second dike is built. It is  expected to start the constructions of the dike early next week.
 
Dave
Block 285