The Ridgefield Inland Wetlands Board has approved suction dredging of Rainbow Lake.  The Ridgefield Lakes Association submitted plans to remove muck and leaves from 3 locations.  The sites identified are 65 Crescent Drive, the Ridgefield Lakes Association Beach, and 247 Mountain Road.  The private homeowner group, which relies on dues and voluntary contributions, must raise money for the proposed work.  Erosion and sedimentation controls for on-shore areas where the material removed would be dried out, along with water quality protections were included in the plans.