Former Larsen’s building in Waterville gets ‘top-to-bottom’ renovation and will house nutrition store Businessman Bill Mitchell is renovating 57 Main St. in downtown Waterville, where Elm City Nutrition is slated to open on the first floor this spring and the upper two floors are large, high-end apartments. Share Bill Mitchell stands Friday in the entryway to his newly renovated property at the corner of Common and Main streets in downtown Waterville. Michael G. Seamans/Morning Sentinel WATERVILLE — Businessman Bill Mitchell is again investing in downtown as part of revitalization efforts, this time renovating a historic building at the corner of Main and Common streets that formerly was home to Larsen’s Jewelry.