Developer nixes $335M Iron Hill project in Midtown, citing COVID-19 Cullinan Properties said the 850,000-square-foot mixed-use development with office, retail, multifamily and hotel "just isn't feasible" Credit: SLBJ The redevelopment of SLU's 14 acres has been branded Iron Hill, named for St. Louis’ history in the steel industry and the plateau the development will sit atop, according to developer Cullinan Properties. Author: Steph Kukuljan – St. Louis Business Journal Published: 6:51 AM CDT April 6, 2021 Updated: 6:51 AM CDT April 6, 2021 Peoria, Illinois-based Cullinan Properties confirmed to the Business Journal on Monday that it is no longer pursuing the project it called Iron Hill, saying the 850,000-square-foot mixed-use development with office, retail, multifamily and hotel "just isn't feasible" with the timeline and investment Cullinan agreed to before the pandemic.