The difficulty lies in the fact that this existing roof belongs to a private investor, represented by Basement development. The investor is willing to allow temporal public use, but wants to be able to take the space back into the office portfolio as parking at any desired time. This requires a flexibility that should be combined with a long term commitment to guarantee substantial water storage, if one wants the Waterboard to co-invest in a polderroof here....
... AND THE PRIVATE PUBLIC
...the team discovered though, that the groundfloor of the parking belongs to the municipality. This public gloomy back alley space currently causes problems of social safety. If we manage to take the Katshoek building and its parking out of the sewage system by taking care of its own water storage, then a storm LET’S MAKE THE PUBLIC PRIVATE ...
water sewage will not be needed any more here and also public access could be terminated. At such a moment a public-private swap could be arranged: Ground level will be privatised and the roof will become publicly owned. Currently bart is working out his fairly brilliant idea into an agreement.