Fixed breakwaters usually consist of mounded rubble or concrete barriers. These types of breakwaters offer protection from high and fast-moving waves and can still offer protection even if mildly damaged in heavy storms. Stone or rubble that is dislocated by heavy waves can be easily repaired without having to replace the entire structure. Some aquatic creatures use breakwaters as a habitat, and fixed breakwaters that are placed with open segments allow free movement of aquatic wildlife.
Credits:http://www.ehow.com/list_6830350_pros-cons-breakwaters.html
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