b'MAJOR INDUSTRIAL MINERAL PRODUCERSBlue Mountain Operations Ojibway MineCovia Holdings CorporationWindsor Salt Ltd. (Stone Canyon Industries Holdings)nepheline syeniteopen pit (Mining Act) rock saltunderground (Mining Act) LocationMethuen TownshipLocationWindsorSandwich Township Address260 Unimin Rd., County Rd. 46, R.R. 1AddressP.O. Box 7008 Havelock, ONK0L 1Z0200 Morton Dr. Contact(705) 877-2500Windsor, ONN9J 3W9 Websitehttps://coviacanada.comContact(519) 967-2201 Employees208 Employees200Goderich Evaporator Plant Penhorwood MineCompass Minerals Canada Corp.Magris Talc Canada Inc. (Imerys Talc Canada Inc.)salt in brine (Oil, Gas and Salt Resources Act) talcopen pit (Mining Act)primary plantmicronising plant LocationGoderich TownshipLocationQuarry and primary processing plant AddressEvaporation PlantPenhorwood Township P.O. Box 100Micronising PlantTimmins 245 Regent St.Address100 Water Tower Rd. Goderich, ONN7A 3Y5P.O. Box 1245 Contact(519) 524-8338Timmins, ONP4N 7J5 Websitewww.compassminerals.comContactHead Office (Toronto) Employees90 (416) 901-9877 info@magrispm.com Websitewww.magrispm.com/magristalc Goderich Salt Mine Employees65 (130 at peak)Compass Minerals Canada Corp.rock saltunderground (Mining Act) LocationGoderich TownshipSt. Lawrence MineAddressP.O. Box 370Canadian Wollastonite 300 North Harbour Rd. wollastoniteopen pit (Mining Act)diopsidegranite aggregate Goderich, ONN7A 3Y9LocationSeeleys Bay (Kingston) Contact(519) 524-8351Address6675 Hwy 15 Websitewww.compassminerals.comSeeleys Bay, ONK0H 2N0 Employees480 ContactBob Vasily (613) 387-2734 Fax: (613) 387-3934 Hagersville Mine bob.vasily@canadianwollastonite.com CGC Inc.Websitewww.canadianwollastonite.comgypsumunderground (Mining Act)EmployeesSummer16, winter5LocationOneida Township AddressP.O. Box 99 Hagersville, ONN0A 1H0Windsor Evaporation FacilityContactCorporate OfficeWindsor Salt Ltd. (Stone Canyon Industries Holdings) (905) 803-5600salt in brine (Oil, Gas and Salt Resources Act) Customer ServiceLocationWindsorSandwich Township (800) 387-2690AddressEvaporation Plant Websitewww.usg.com P.O. Box 7008 Employees350 30 Prospect AvenueWindsor, ONN9C 3G3 Contact(800) 361-5765 Employees95OTHER INDUSTRIAL MINERAL PRODUCERSSpanish River Carbonatite Tatlock Quarry SRC Agrominerals Inc. (formerly Boreal Agrominerals Inc.)OMYA (Canada) Inc. carbonatite, vermiculiteopen pit (Aggregate Resources Act) calcium carbonateopen pit (Aggregate Resources Act)LocationVenturi TownshipLocationTatlock QuarryDarling Township AddressSuite 316, 1639 Lasalle BoulevardPlantPerth Sudbury, ONP3A 1Z8AddressP.O. Box 245 Contact(705) 923-7725Perth, ONK7H 3E4 Websitehttps://srcagrominerals.caContactCarlos Morales Velez, Quarry Manager (613) 267-5367 Ext. 6302, (800) 267-8920 Employees6carlos.moralesvelez@omya.comwww.omya-na.com Employees94 ONTARIO MINING AND EXPLORATION DIRECTORY AND RESOURCE GUIDE 2026 25'