Fox River

About

Fox River, Wisconsin Illinois — 1670s French Fur Trade, 1840s-1900s Paper Mills, 2020 $1.3B PCB Cleanup 200-mi. Long before the mills, the Fox River in eastern Wisconsin was the ancestral homeland of the Menominee, Ho-Chunk (Winnebago), and Anishinaabe (Ojibwe) peoples. The river served as a key waterway connecting Green Bay to Lake Winnebago, and via the Wolf River onward to the Wisconsin and Mississippi rivers. That geography made it a corridor of movement and trade. The French fur trade era, running from 1634 to 1763, remains the most-cited cultural touchstone of the early period, followed by British and American colonial control from 1763 to 1815, a lead mining era in the 1820s through the 1850s, and Wisconsin's statehood in 1848.

Statehood arrived alongside the saw. From the 1830s through the 1920s, the Fox River watershed was heavily logged. The Oshkosh and Neenah sawmills operating from the 1848s to the 1890s, a Winnebago County furniture industry from 1855 to 1895, and the Fox River paper mills from the 1880s to the 1910s drew on the surrounding timber. The expansion of the Chicago, Milwaukee & St. Paul Railway from 1855 into the 1910s and the growth of Oshkosh manufacturing from 1870 into the 1910s deepened the demand. Large-scale logging ended with the exhaustion of the white-pine stands in 1895, the start of forestry conservation in 1900, and the creation of the Nicolet National Forest in 1934.

The watershed was studied and reshaped in parallel. The 1869 Fox River Survey, led by Wisconsin State Engineer W.R. Smith, was the first comprehensive hydrological study of the basin, documenting streamflow records from 1830 to 1868 and a land survey from 1868 to 1869. That survey became the basis for the 1880-1920 Winnebago County drainage project, which transformed the 630,000-acre watershed into agricultural land. Nearly a century later, the 1990-2000 Wisconsin DNR Fox River Basin Study identified the major water-quality challenges and laid the groundwork for the 2001 Fox River Water Trail.

By the late nineteenth century, the river's current had become manufacturing muscle, powering a dense chain of paper mills and hydroelectric dams. Through the twentieth century the Fox River Valley grew into the heaviest cluster of pulp and paper mills found anywhere in the world, tied in part to the production and recycling of carbonless copy paper — the source of the PCBs that later required the cleanup. That industrial inheritance carried a cost, and repaying it defined the river's most recent chapter: the 2004-2020 remediation, and a 2010s restoration push anchored by the Fox River Watershed Restoration Project.

That restoration work continues today. The 2024 Fox River Restoration Program — a joint effort of the Winnebago, Outagamie, and Brown County Soil and Water Conservation Departments with the Wisconsin DNR — removed 16 agricultural drainage tiles and restored 380 acres of wetland, recharging 1.4 billion gallons of groundwater annually. The paddling is following the recovery: 2024 user-days reached 18,800, a 30% increase from 2018. The river drains 6,860 square miles, carries an average flow near 981 CFS at gauge 04073365, and supports one of the densest walleye populations in Lake Winnebago. The Fox River Water Trail, designated in 2001, runs 198 miles from Green Bay to the Wisconsin River confluence, part of a network that includes the Fabulous Fox Water Trail, the Fox-Wisconsin Heritage Water Trail, and the Kaukauna 1000 Islands.