Construction is well underway in downtown Napa on the site where Dwight Murray Plaza and the former Kohl’s department store once stood. Cranes now define the skyline above the 3.85-acre block between First, Main, and Pearl streets, where developers are building what is expected to be the most significant private investment in the city’s history. The $300 million project, led by 300 Venture Group of Danville and CMG Financial of San Ramon and built by Build Group of San Francisco, will include 78