To coincide with the Waterfalls launch, the Brooklyn Bridge Park Conservancy and the Brooklyn Bridge Park Development Corporation are opening the gates to their temporary “Pop-Up” park at Pier 1 by Fulton Ferry Landing today at 10 a.m. The 26,000-square-foot landscaped space has a sand play area and lots of picnic tables at which to eat the food being served all summer by RICE in the tented cafe. The park will be open every day through Labor Day. The Daily News runs a rendering (below) from Michael Van Valkenburg today of how the park is ultimately expected to look; the paper also reports that while “key parts” of the park will be ready as soon as the end of 2009, the Development Corporation has secured only two-thirds of the money it needs to complete the park by 2012.”There is no benefit to waiting,” said BBPDC’s Regina Myer. “The construction costs go up every day and we need to get the public out there as soon as possible.”