A Jamestown man is in the Chautauqua County Jail after getting arrested for drunk driving early Saturday. Chautauqua County Sheriff's deputies saw a vehicle commit violations on Washington Street in Jamestown at about 2:30 AM. The vehicle was stopped on Fairmount Avenue in the city, and after further investigation, deputies arrested 44-year-old Mark Hamilton. He was charged with DWI, speeding, and failure to use designated lane, and was taken to the county jail in lieu of bail.