On the afternoon of 06-JUNE-2012, the USCG District 11 Command Center notified the NOAA SSC of an Army Corps of Engineers vessel that had reported a loss of 90-110 gallons of hydraulic fluid from one of their propellers. The release reportedly occured at 2115hrs (Local) on 05-JUNE-2012 approximately 10NM West of Patricks Point, just north of Eureka, CA. USCG D-11 intends to perform an overflight of the area and requested NOAA Trajectory support to inform their search activities.