Scour protection systems, methods, and apparatus

A system adapted for use in protecting an undersea monument foundation against undersea scour, the system comprising:

• an application of a single-layer gravity-based protection to a central area adapted to be centered around a center of the undersea monument foundation, and
• an installation of a fronded concrete mattress border covering and surrounding a periphery of the single-layer gravity-based protection;
• wherein the application of the single-layer gravity-based protection is adapted to be applied to an undersea ground surface at an intended site of the undersea monument foundation, with the central area central to the intended site;
• wherein the installation of the fronded concrete mattress border is adapted to be installed below and support any export cable exiting a monument positioned on a foundation installed at the intended site, and
• wherein a plurality of fronds of the fronded concrete mattress is adapted to engage and shelter the export cable supported on the installation.

A method adapted for use in protecting an undersea monument foundation against undersea scour, the method comprising:

• preparing an undersea ground surface at an intended site of an undersea monument foundation;
• applying a single-layer gravity-based protection to a central area of the undersea ground surface at the intended site of the undersea monument foundation;
• and
• installing a fronded concrete mattress border covering and surrounding a periphery of the single-layer gravity-based protection;
• wherein installing the fronded concrete mattress border is adapted to position the fronded concrete mattress border below and to support any export cable exiting a monument positioned on a foundation installed at the intended site, and
• wherein a plurality of fronds of the fronded concrete mattress is adapted to engage and shelter the export cable supported on the installation.