국내 환경준설 소식 해양 하천 기타 공공 수역 Foreign environmental dredging news U.S. Army Corps of Engineers renews bid to dump sediment in Lake Erie Hudson River PCB dredging nears finish line Scientist identify bacterial culture to treat polluted Kishon sediment HMDA shelves dredging along Kukatpally inlet Dredging set for Gunners Lake in Germantown, followed by Lake Whetstone in Montgomery Village Schumer announces US$1 billion for port projects