Jeffrey Val Klump is an American limnologist. He was the first person to reach the deepest spot in Lake Superior, a depth of 1333 feet (733 feet below sea level), the second lowest point in the United States after Iliamna Lake, on July 30, 1985 while aboard the R/V Seward Johnson with the Johnson Sea Link-II submersible.[1] Klump was also the first person to reach to the deepest point in Lake Michigan as part of the same expedition. He is currently a professor and associate dean at the University of Wisconsin–Milwaukee School of Freshwater Sciences.[2]

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