Mayor Zohran Mamdani’s administration is expected to reach a settlement with developers that cancels the Haven Green project, a 123-unit rental for low-income seniors on the site of the Elizabeth Street Garden, in exchange for a new affordable development on a vacant Lower East Side lot. On Wednesday, Mamdani said the actions of former Mayor Eric Adams, who designated the city-owned site as parkland last year, requiring state legislature approval for development, made it “nearly impossible” to move ahead with the housing project. The Elizabeth Street Garden was formerly a vacant public lot that Allan Reiver, who had leased it from the city beginning in 1991, turned into one of the city’s most unique spaces.