June 22, 1969:
The Cuyahoga River at one time was one of the most polluted rivers in the United States. The reach from Akron to Cleveland was devoid of fish. A Kent State University symposium, convened one year before the infamous 1969 fire, described one section of the river:
There have reportedly been at least thirteen fires on the Cuyahoga River, the first occurring in 1868. The largest river fire in 1952 caused over $1 million in damage to boats and a riverfront office building. Fires erupted on the river several more times before June 22, 1969, when a river fire captured the attention of Time magazine, which described the Cuyahoga as the river that "oozes rather than flows" and in which a person "does not drown but decays."
- From 1,000 feet below Lower Harvard Bridge to Newburgh and South Shore Railroad Bridge, the channel becomes wider and deeper and the level is controlled by Lake Erie. Downstream of the railroad bridge to the harbor, the depth is held constant by dredging, and the width is maintained by piling along both banks. The surface is covered with the brown oily film observed upstream as far as the Southerly Plant effluent. In addition, large quantities of black heavy oil floating in slicks, sometimes several inches thick, are observed frequently. Debris and trash are commonly caught up in these slicks forming an unsightly floating mess. Anaerobic action is common as the dissolved oxygen is seldom above a fraction of a part per million. The discharge of cooling water increases the temperature by 10 °F (5.56 °C) to 15 °F (8.33 °C). The velocity is negligible, and sludge accumulates on the bottom. Animal life does not exist. Only the algae Oscillatoria grows along the piers above the water line.
- The color changes from gray-brown to rusty brown as the river proceeds downstream. Transparency is less than 0.5 feet in this reach. This entire reach is grossly polluted.
The 1969 Cuyahoga River fire helped spur an avalanche of water pollution control activities resulting in the Clean Water Act, Great Lakes Water Quality Agreement, and the creation of the federal Environmental Protection Agency and the Ohio Environmental Protection Agency (OEPA). As a result, large point sources of pollution on the Cuyahoga have received significant attention from the OEPA in recent decades. These events are referred to in Randy Newman's 1972 song "Burn On", R.E.M.'s 1986 song "Cuyahoga", and Adam Again's 1992 song "River on Fire". Great Lakes Brewing Company of Cleveland, Ohio have named their Burning River Pale Ale after the event. During the Gulf Oil Spill of May 2010, New York Times economist and Nobel Laureate Paul Krugman referred to the Cuyahoga fire as the start of “environmentalism”.
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