St Marys River Unknown Sheen; Sault Ste. Marie, MI
Sault Ste. Marie, MI, USA | 2024-Jul-16
Initial Notification: On 7/16/2026 at approximately 0930 Eastern, USCG Sector Northern Great Lakes contacted the SSC by phone regarding a sheen observed on the St. Mary's River in Michigan near Sault Ste. Marie. The oil, source, quantity, and responsible party were not positively identified, though USCG learned of a small (5-10 gal) inadvertent discharge by a USACE facility upstream the following evening. USCG-contracted OSRO arrived on scene, though the sheen was determined to be unrecoverable. A small quantity of possible emulsified oil was observed collecting in a low flow area.
Incident Details
| Primary threat: | Oil |
| Products of concern: | Oil |
| Total amount at risk of spill: | 10 gallons |
| Latitude (approximate): | 46° 30.04′ North |
| Longitude (approximate): | 84° 19.96′ West |
| On-Water Recovery: | Applied |
| Shoreline Cleanup: | Unknown/Not applicable |
| Dispersants: | Unknown/Not applicable |
| In-Situ Burn: | Unknown/Not applicable |
| Bioremediation: | Unknown/Not applicable |