A previous town of Cortlandt employee and the owner of a landscaping organization have been arrested Thursday and indicted on general public corruption and fraud fees in relationship with an unlawful dumping plan on a town-owned lot. Robert Dyckman, 51 of Verplanck, a previous assistant basic foreman with the town of Cortlandt, and Glenn Griffin, 53, of Cortlandt Manor, the proprietor, president and principal of Griffin’s Landscaping Company, have been arrested and indicted, in accordance to Damian Williams, the U.S. Lawyer for the Southern District of New York. Griffin also was indicted in relationship with a independent bid-rigging plan in the village of Croton-on-Hudson and the hamlet of Verplanck. The…