Accretion

The increase or addition of land by the deposit of sand or soil washed up naturally from a river, lake or sea. The gradual and imperceptible addition of land by alluvial deposits of soil through natural causes, such as shoreline movement caused by streams or rivers. This added land upon a bank or stream, navigable or not, becomes the property of the riparian or littoral owner, and it also becomes subject to any existing mortgages.

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