Sumpter Gold Dredge - Sumpter, Oregon

The Sumpter Gold Dredge (specifically Sumpter No. 3) is a massive, floating Yuba-style placer mining machine that now serves as the centerpiece of the Sumpter Valley Dredge State Heritage Area in Eastern Oregon. Operating almost continuously from 1935 to 1954, this 1,250-ton behemoth extracted gold by scooping up earth with 72 one-ton buckets, processing the material inside its 125-foot hull, and recovering gold flakes before expelling the waste. Although the dredge recovered approximately $4.5 million in gold, the company ultimately ceased operations in 1954 $100,000 in debt. Its legacy is visible for miles in the distinctive stacks of stone known as tailings, which spread across the Sumpter Valley, dramatically transforming the natural meadows along the Powder River. Preserved today as a monument to area mining and added to the National Register of Historic Places in 1971, the dredge offers visitors a glimpse into the industrial methods and environmental impacts of gold extraction.