resistant to ultraviolet light to preclude deterioration from prolonged sunlight exposure. Lighter bags
(100-pound range), such as those used for revetments, are displaced when exposed to even moderate
waves. Larger units such as Dura Bags are recommended even though they are more difficult to handle,
and must be filled in place.
A filter cloth should be placed under the bags to reduce settlement in soft bottoms (Figure C-
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