RedactedNarrative: Vessel #1 was operating on Lake St. Clair at approximately 20 mph southeast of the Clinton River.  Vessel struck a partially submerged pipe causing damage to his hull, tearing off one outdrive.  Vessel took on water and was towed by Tow Boat US.  The pipe in question extended from a barge conducting dredge operations approximately 1/8 mile off  shore to a marked construction operation onshore.  Site is marked and USCG has broadcast warnings regarding operations there. Dredging operation info is listed above.  No injuries were reported. 