Opponents of dredging the Port of Miami's main shipping channel to 50 feet will withdraw petitions seeking to block the project after Miami-Dade County officials agreed to contribute $2.3 million to support environmental programs aimed at protecting and restoring Biscayne Bay, the county announced Thursday. The deal, which must still be approved by the Board of County Commissioners at its May 1 meeting, will allow the Army Corps of Engineers to move ahead with cons...