Abstract: A deployable cofferdam web-supporting frame assembly for a cofferdam system configured to be installed within a body of water to at least partially delimit therein an enclosure. The deployable cofferdam web-supporting frame assembly comprises first and second frame-supporting structures comprising first and second apexes and first and second groups of longitudinally extending frame-supporting legs each having a waterbed-engaging end, the first and second frame-supporting structure being configurable into a usage configuration wherein the frame-supporting legs are connected to each other with the waterbed-engaging ends thereof being spaced apart from one another, and a storage configuration wherein the frame-supporting legs are substantially parallel to each other; and a connecting assembly connecting the first and second apexes to each other. It also concerns a cofferdam system comprising the same and a corresponding method for delimiting an enclosure within a body of water.

Abstract: The present disclosure relates to a cofferdam system securable to an underwater structure and across a body of water. The system includes a post support and anchoring assembly securable to the structure, a web support frame which extends upwardly from the post support and anchoring assembly in a spaced apart configuration from a surface defined by the underwater structure, as well as a substantially flexible impermeable web which is positioned across the body of water and which is adapted to cover the post support and anchoring assembly and at least a lower section of the web support frame outwardly therefrom. Such configuration of the system allows to provide a substantially dry enclosure from a dam upstream side between the substantially flexible impermeable web and the underwater structure when mounted thereto and once water is being removed from a dam downstream side. A method for installing the same is further described.

Abstract: The present disclosure relates to a cofferdam system securable to an underwater structure and across a body of water. The system includes a post support and anchoring assembly securable to the structure, a web support frame which extends upwardly from the post support and anchoring assembly in a spaced apart configuration from a surface defined by the underwater structure, as well as a substantially flexible impermeable web which is positioned across the body of water and which is adapted to cover the post support and anchoring assembly and at least a lower section of the web support frame outwardly therefrom. Such configuration of the system allows to provide a substantially dry enclosure from a dam upstream side between the substantially flexible impermeable web and the underwater structure when mounted thereto and once water is being removed from a dam downstream side. A method for installing the same is further described.