Abstract: A dredge head assembly is disclosed. The assembly includes: a shroud having a generally open bottom end and a top end; a screen structure covering the generally open bottom end of the shroud; a suction pipe with a first end connected to the top end of the shroud and a second end configured to be operatively connected with a pump which induces suction; a handle connected to and extending from the shroud and having at least one grasping portion; and one or more vacuum relief valve assemblies, each comprising a valve, at least one opening configured to be in communication with water, and an actuation mechanism positioned to be accessible to a diver. Dredging systems and methods of dredging are also disclosed.

Abstract: Methods and systems for use in the removal of trunnion pin sleeves and the supporting of lock and/or dam gate structures (e.g., tainter or roller gates) are disclosed herein. In one example embodiment, a method of trunnion pin sleeve removal includes causing either a constriction of at least one part of the sleeve or an application of a torque with respect to the at least one part of the sleeve, and subsequently applying a force to the at least one part of the sleeve so as to pull out the sleeve. Also, in another example embodiment, a system for supporting a lock and/or dam gate assembly includes a support assembly having a at least one pedestal assembly. The support assembly further includes a trunnion arm support structure, configured to be supported at least in part by the at least one pedestal assembly and to at least partially support a trunnion arm.

Abstract: Methods and systems for use in the removal of trunnion pin sleeves and the supporting of lock and/or dam gate structures (e.g., tainter or roller gates) are disclosed herein. In one example embodiment, a method of trunnion pin sleeve removal includes causing either a constriction of at least one part of the sleeve or an application of a torque with respect to the at least one part of the sleeve, and subsequently applying a force to the at least one part of the sleeve so as to pull out the sleeve. Also, in another example embodiment, a system for supporting a lock and/or dam gate assembly includes a support assembly having a at least one pedestal assembly. The support assembly further includes a trunnion arm support structure, configured to be supported at least in part by the at least one pedestal assembly and to at least partially support a trunnion arm.