 Tributaries from the south include Plum Creek, 35 miles (56 km) long, which flows northeastwardly through Murray and Redwood Counties, past Walnut Grove; and Dutch Charley Creek, 46 miles (74 km) long, which flows northeastwardly through Murray, Cottonwood, and Redwood Counties.Approximately 84% of land in the Cottonwood River watershed is used for agriculture; the predominant crops are corn and soybeans.Wetlands in the watershed have been extensively drained, and fewer than 4,000 acres (16 km²) remain.