| http://www.w3.org/ns/prov#value | - In the late 1920s and early 1930s, Ernest Oberholtzer of Rainy Lake and Sigurd Olson of Ely and conservation organizations such as the Izaak Walton League successfully worked to block logging of shoreline timber, construction of hydropower dams and road-building throughout what later became the Boundary Waters.
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