Even though the 1998-99 charrette focused on Miami Shores and El Portal it was funded by a regional planning initiative (http://www.sfrpc.com/eho.htm) and included the idea for the Little River Preserve. Afterwareds a citizens committee from Oakland Grove in Miami and El Portal worked with City of Miami Parks to do this proposal. It was funded, a management plan draft and environmental study initiated, and then arsenic pollution was discovered. The history of that is in
AfterBrownfieldFinal_Report1june02.pdf
Since then it has become easier to get brownfields funding for pollution cleanup. The site stayed listed as a park in the master plan (though in Miami21 is listed as "sub-urban" whatever that is).