Fall Creek (New York)

The length of Fall Creek is roughly between and . From there, it flows roughly south through towns including Groton and McLean. Tributaries that join the river during this section include outflows from the McLean Bogs. The river's course then shifts roughly south-west towards Cayuga Lake. It then passes through Freeville and Etna, receiving another major tributary, Virgil Creek, which is in turn the outflow of Dryden Lake. Other tributaries in this area include Beaver Creek and Mud Creek. Near Varna, Fall Creek enters the Monkey Run Natural Area, operated by the Cornell Botanic Gardens; it then flows through another Cornell-run preserve. As the river enters its final stretch, the land surrounding it becomes the "Fall Creek Gorge", with a vertical drop at points reaching almost . Cornell Campus and Ithaca Fall Creek flows through the campus of Cornell University and into Ithaca, New York, before reaching Cayuga Lake. Another feature in this area is Beebe Lake, a man-made lake. The river then goes over Flume Falls, Triphammer Falls, Rocky Falls (by the Cornell University Hydroelectric Plant), Foaming Falls, Forest Falls and Ithaca Falls. It empties into Cayuga Lake at Stewart Park. Discharge The United States Geological Survey monitors the flow of Fall Creek at a gauging station above Beebe Lake. The station has been run in cooperation with Cornell University since 1925. Based on this station's data, the river's median discharge is per second. The average discharge in 2025 was per second, peaking in May, with an average of per second, and bottoming out in September, with an average of per second. The maximum daily discharge ever recorded through Fall Creek occurred on July 8, 1935, when per second flowed through the river, and the minimum flow was recorded on September 6 and 7, 1999, at per second. == Geologic history ==

The modern-day watershed area of Fall Creek is thought to be much smaller than it once was; it once included the current Tioughnioga River watershed. Land reshaping associated with periods of quaternary glaciation, split the valley in two, leaving the Fall Creek and Tioughnioga watersheds distinct, a process that some geologists have termed "beheading" of the valley. There is no scholarly consensus on when this occurred, though it was likely before the Erie Interstade (roughly 18-22 thousand years ago). == History ==

Prior to widespread European arrival in upstate New York, the land surrounding Ithaca, New York, was the homeland of the Cayuga people. They were forced off of their land during the 1779 Sullivan Expedition. Following the end of the American Revolution, land in the area was granted to soldiers as part of the Central New York Military Tract, and settlement continued throughout the early 19th-century. Many of the communities that emerged on the banks of Fall Creek were initially mill towns, including Dryden, Forest Home, and Fall Creek (later part of Ithaca). A mill below Ithaca Falls was built in the 1810s. In the 1820s, Ezra Cornell was hired to manage Jeremiah S. Beebe's mills on the creek. He led several construction projects, including that of a dam above Triphammer Falls, which created Beebe Lake where there had originally been a swamp, and a tunnel serving the mill below Ithaca Falls. An 1898 history of Dryden described the Fall Creek as providing "abundance of mill sites for water power" in the town, and wrote that development in that section had resulted in most of the trees near the river being cut down. Cornell University In 1857, Ezra Cornell purchased of land bordering Fall Creek, which he initially operated as a farm. As part of the foundation of Cornell University in 1865, Ezra Cornell agreed to donate this land to the university, and its first buildings were constructed on the land. By 1875, Cornell was drawing its water from Fall Creek. A study undertaken that year by two university professors determined that the quality of the river's water was compromised because raw sewage was regularly dumped into it. Early efforts to address this were unsuccessful, and in 1902, the New York Health Commissioner, Daniel Lewis, issued regulations aimed at protecting Fall Creek's watershed. In 1898, the University constructed a hydraulic research lab on the gorge wall below Beebe Lake. The lab was abandoned in the 1960s, and collapsed into the gorge in 2009. The following year, work began to remove the debris, which was later completed. The gorge also divides Cornell's Central Campus from its residential North Campus. Two major bridges span the gorge in this area: the Thurston Avenue Bridge (opened 1898), and the Stewart Avenue Bridge (opened 1900). A pedestrian suspension bridge was opened in 1913, and replaced in an updated form in 1960. These bridges have been the site of several gorge suicides, and in response Cornell placed nets underneath them in the early 2010s. Cornell University has generated electricity from Fall Creek since the 1880s. In 1904, the University opened a hydroelectric plant on Fall Creek, which was renovated in 1981. As of 2023, the plant was active and annually generated 4.5M to 5.5M kilowatt-hours of electricity, contributing ~3-5% of the University's total power. Planned Monkey Run dam In 1910, the City of Ithaca began considering construction of a water reservoir on Fall Creek, between Etna and Varna, to serve the city. The proposed reservoir would have had a capacity of around 500 million gallons. Around the same time, Cornell also investigated the possibility of constructing the same reservoir, which it hoped would stabilize the river's flow and provide increased hydroelectric capacity. It began purchasing farmland to construct this dam in 1911, and continued to do so for the next several years. From 1912 to 1916, of this land, exclusively portions higher than the planned dam, was reforested by the Cornell Department of Forestry. A 1922 report, however, determined that it would be too expensive for the University to develop substantial further hydroelectric capabilities on Fall Creek. Nevertheless, the University continued to consider constructing a dam near Varna until 1941, when, on April 26, control of the tract was given to the Cornell Botanic Gardens. Development and preservation As Ithaca has developed, Fall Creek has periodically flooded, most notably in 1935, 1971, 1981, 1993, and 2005.''' The following decade, researchers estimated that the Fall Creek watershed was 34% forested and 40% agricultural, with most of the remaining land deemed "abandoned agricultural land returning to forest." Most of the agricultural land was used for dairy farming. In 1974, Hamilton proposed that the land surrounding the river be named a "recreational river" by New York State, arguing that unrestricted development could degrade its water quality. Cornell and the City of Ithaca considered plans for a second hydroelectric plant, this one at the foot of Ithaca Falls, in the 1980s. The city received a permit to construct the plant, and in 1988 voters approved its construction. However, a campaign to prevent such development successfully encouraged the City Council to pass a resolution that requested New York designate portions of the river as a "recreational river", and in 1990 the final of Fall Creek, from just beyond Beebe Lake to its end in Cayuga Lake, were designated as such. This designation prevented further hydropower projects. In the 21st century, the Finger Lakes Land Trust has purchased several tracts of land along the river for preservation. These include the Dorothy McIlroy Bird Sanctuary near Fall Creek's headwaters, established in 2002 and expanded in 2003, 2013, and 2019; the Genung Nature Preserve in Freeville, acquired in 2005; the Etna Nature Preserve, established in 2011 and expanded in 2025; another purchased in 2024 that includes of riverfront, near the river's origins; and near Summerhill, including of Fall Creek, acquired in 2025. == Watershed ==

Fall Creek has a watershed of , which is the largest single section of the broader Cayuga Lake watershed. It is also the largest single tributary to the lake. A 2017 study reported that the watershed was roughly 50% forested and 50% agricultural land, while in 2012 researchers estimated it to be 48% agricultural, 40% forested, and 11% urban. == Recreation ==

The river is a popular site for recreation along its length, including hiking, swimming, kayaking and canoeing, and fishing. The New York State Department of Environmental Conservation annually stocks portions of Fall Creek with brown trout and brook trout. ==References==