Abstract: A bulkhead system and a method of implementing such a bulkhead system in relation to a dam are disclosed herein. In one example embodiment, such a method includes providing a plurality of bulkhead sections assembled together as a bulkhead assembly, and coupling first side, second side, and bottom assemblies respectively to a first end, second end, and bottom surface respectively of the bulkhead assembly. Further, the method includes causing a first of the bulkhead sections to receive a respective amount of ballast within an internal cavity therewithin, receiving water pressure at an upstream surface of the bulkhead assembly such that the bulkhead system is forced against the dam and substantially sealed in relation thereto, and operating to counteract the water pressure and thereby prevent or limit the flow of water past the dam, where the operating is performed at least in part by the side assemblies and bottom assembly.

Abstract: A bulkhead system and a method of implementing such a bulkhead system in relation to a dam are disclosed herein. In one example embodiment, such a method includes providing a plurality of bulkhead sections assembled together as a bulkhead assembly, and coupling first and second side assemblies to first and second ends of the bulkhead assembly. Further, the method includes causing a first of the bulkhead sections to receive a respective amount of ballast within an internal cavity therewithin, receiving water pressure at an upstream surface of the bulkhead assembly such that the bulkhead system is forced against the dam and substantially sealed in relation thereto, and operating to counteract the water pressure and thereby prevent or limit the flow of water past the dam, where the operating is performed at least in part by one or more brace members of the side assemblies.

Abstract: A bulkhead system and a method of implementing such a bulkhead system in relation to a dam are disclosed herein. In one example embodiment, such a method includes providing a plurality of bulkhead sections assembled together as a bulkhead assembly, and coupling first and second side assemblies to first and second ends of the bulkhead assembly. Further, the method includes causing a first of the bulkhead sections to receive a respective amount of ballast within an internal cavity therewithin, receiving water pressure at an upstream surface of the bulkhead assembly such that the bulkhead system is forced against the dam and substantially sealed in relation thereto, and operating to counteract the water pressure and thereby prevent or limit the flow of water past the dam, where the operating is performed at least in part by one or more brace members of the side assemblies.

Abstract: Contaminated fine sediment is removed from surfaces beneath a body of water by a shrouded, self-cleaning, wheel-guided, open suction attachment for a swinging ladder suction dredge with articulating capabilities. The attachment comprises a wheel-guided, suction assembly in which the slurry is contained in a shroud. The shroud is attached to a head plate, and is designed to both enclose the solid particles suspended as a result of the removal operation, and to direct the suspended material to the mouth of the suction pipe. Inside the area surrounded by the shroud is a gatling plate rotated by a hydraulic motor mounted just above the shroud and head plate.

Abstract: Sub-aquatic sediment is covered with capping material by a capping system comprising a template barge and a spreader barge. While the spreader barge is distributing capping material, the template barge guides the spreader barge as it systematically moves over a pre-defined sediment capping region. The spreader barge comprises a spreader pool in which a broadcast spreader accurately and evenly distributes capping material within the pool, which then sinks to the sediment. The capping material is distributed with minimal disturbance to the sediment.

Abstract: Sub-aquatic sediment is covered with capping material by a capping system comprising a template barge and a spreader barge. While the spreader barge is distributing capping material, the template barge guides the spreader barge as it systematically moves over a pre-defined sediment capping region. The spreader barge comprises a spreader pool in which a broadcast spreader accurately and evenly distributes capping material within the pool, which then sinks to the sediment. The capping material is distributed with minimal disturbance to the sediment.