The Ridgefield Inland Wetland Commission and the Planning and Zoning Commission are holding a work session tonight about a proposed ballfield.  Ridgefield Little League is looking to create the field and related amenities on town-and-state-owned land at Route 7 and Simpaug Turnpike.  Three public hearings were held on the application.  Plans for the 2.5 acre lot include lighting, bleachers, a parking lot and concession stand.