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story by Tina Sfondeles in the Chicago Sun-Times, the material has already been used at Soldier Field and Daley Plaza, and it never dematerializes. It's claimed to be waterproof, which is a big deal, as the previous park on the site Daley Bi-Centennial, including beautiful mature trees was torn up and thrown away because was water was leaking into the garage on which the park was built, necessitating everything being removed for a new sealing to be installed.
Valkenburgh on Daley Bi, North Grant Park (with video)
Reinventing Daley Bi
Goodbye Daley Bi; Hello Maggie Daley Park - stripping North Grant Park bare
(Better) Performing Seals fine new home at Maggie Daley Park