Lake Erie Watershed, showing 8-digit/Tertiary Sub-Basins LEW3 LAKE ERIE WATERSHED SUB-BASINS IN CANADA SECONDARY WATERSHED: 02G "NORTHERN LAKE ERIE" TERTIARY WATERSHED CODES AND NAMES (names on map) 02GA - Upper Grand 02GE - Lower Thames ONTARIO 02GB - Lower Grand 02GF - Rondeau 02GC - Big 02GG - Sydenham 02GD - Upper Thames 02GH - Cedar Lake Huron Lake Ontario Upper Grand Guelph Lake Huron Kitchener Watershed Upper Thames St. Clair Niagara Falls Lower Grand Niagara Lake Ontario Watershed Sarina London MICHIGAN Buffalo Big Sydenham Buffalo-Eighteenmile Clinton NEW YORK Lower Thames Lake Michigan Lake St. Clair Rondeau Watershed Cattaraugus Lake Huron Detroit St. Clair Detroit Ann Arbor Windsor Chautauqua-Conneaut Cedar Lake Erie Erie Raisin PENNSYLVANIA Ottawa-Stony LAKE ERIE WATERSHED SUB-BASINS IN THE U.S.A. 8-DIGIT HUC WATERSHED NUMBERS AND NAMES (names on map) Toledo Tiffin Grand SUBREGION: 0409 "ST. CLAIR-DETROIT" "WESTERN LAKE ERIE" - cont'd St. Joseph Chagrin-Ashtabula 04090001 - St. Clair 04100011 - Sandusky Cedar-Portage Cleveland 04090002 - Lake St. Clair 04100012 - Huron-Vermilion Lower Maumee 04090003 - Clinton 04090004 - Detroit SUBREGION: 0411 "SOUTHERN LAKE ERIE" 04090005 - Huron 04110001 - Black-Rocky Black-Rocky 04110002 - Cuyahoga Upper Maumee Cuyahoga Huron-Vermilion SUBREGION: 0410 "WESTERN LAKE ERIE" 04110003 - Ashtabula-Chagrin Fort Wayne Sandusky Akron 04100001 - Ottawa-Stony 04110004 - Grand 04100002 - Raisin Blanchard 04100003 - St. Joseph SUBREGION: 0412 "EASTERN LAKE ERIE" INDIANA Auglaize 04100004 - St. Marys 04120001 - Chautauqua-Conneaut 04100005 - Upper Maumee 04120002 - Cattaraugus St. Marys 04100006 - Tiffin 04120003 - Buffalo-Eighteenmile 04100007 - Auglaize 04120004 - Niagara OHIO 04100008 - Blanchard 04100009 - Lower Maumee ACCOUNTING UNIT: 041202 "LAKE ERIE" 04100010 - Cedar-Portage 04120200 - Lake Erie 0 25 50 75 100 Watershed Legend This map is a product of the Ohio Department of Natural Resources (ODNR) Miles Lake Erie Watershed Boundary Office of Coastal Management and is GIS Dat a Sources intended to provide general information only. 8 digit HUC Watershed Boundaries (OH) - ODNR, various dates 8-digit HUC Watershed Boundaries 8 digit HUC Watershed Boundaries (IN, MI , NY, PA) - downloaded from U.S.A. Tertiary Watershed Boundaries Canada coastal.ohiodnr.gov Map created: 01/15 USDA Geos patial Data Gateway, 2015 Tertiary Waters heds (ON) - Ontario Minis try of Natural Res ources, 2010 { }.