Provo leaders will start reviewing this week an ambitious and controversial plan for a 20,000-seat music venue in Provo Canyon — a proposal launched by some of Utah’s most famous entertainers, the Osmonds. The proposed venue’s seating capacity would put Vesper Amphitheater on a level with Salt Lake City’s Delta Center and Sandy’s America First Field, or a bit smaller than Utah First Credit Union Amphitheatre in West Valley City. The development would contain a state-of-the-art music venue, hotel villas, restaurants, retail spaces and up to 8,000 parking spaces, according to a concept plan included in a development proposal Vesper is making to Provo. Commissioners who voted down the request said the project was still in its early stages, was too big, and raised concerns about traffic and congestion. This article is published through the Utah News Collaborative, a partnership of news organizations in Utah that aims to inform readers across the state.