DPW Superintendent Calvin Martyn 320 Prospect St. Louis, MI 48880 (989) 681-3644 Fax: (989) 681-5113 cmartyn@stlouismi.com Hours:  7:00am – 4:00pm After Hours/Holidays: Contact Gratiot County Central Dispatch for assistance with EMERGENCIES at 989-875-7505.  There is a $100 charge for after hours and holiday service calls if the emergency is considered the responsibility of the homeowner. … Continue reading DPW