State dredge workers dig out part of a 100-foot-long sediment trap in a creek near state Route 219 and Club Island Road earlier this week. They also plan to dredge 300 to 400 feet of the creek beyond the trap to remove accumulated sediment, said Brian Miller, Grand Lake St. Marys State Park assistant manager. The creek empties into the lake in Franklin Township. A sediment trap is an area dug out at the bottom of a stream used to capture soil runoff and attach nutrients before it enters a lake or water body. The work is being done in conjunction with Franklin Township trustees. State officials plan to build three more of the traps this year and two more next year. The structures are being built to improve water quality in the lake. They will be dipped out as needed.