(Leah Hogsten | The Salt Lake Tribune) Justin Swain with Utah for Responsible Growth discusses the group's plan to launch a referendum to block the proposed Olympia Hills development and to ask for volunteers in that effort, Mar. 4, 2020. Plans for Olympia Hills call for as many as 6,330 new single-family homes, town homes and apartments and 1.8 million square feet of office and retail spaces to be built over 25 years in the unincorporated southwest corner of Salt Lake County. On Thursday, Utah for Responsible Growth suspended all signature gathering for the referendum, due to requirements that the group said made it financially unfeasible to gather electronic signatures.