Question: What type of details about allen hazen can be gathered from the following bio? Bio: allen hazen -lrb- 1869 -- 1930 -rrb- was an expert in hydraulics , flood control , water purification and sewage treatment . his career extended from 1888 to 1930 and he is , perhaps , best known for his contributions to hydraulics with the hazen-williams equation . hazen published some of the seminal works on sedimentation and filtration . he was president of the new england water works association and vice president of the american society of civil engineers .
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