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© Dana Romanoff/Getty ImageWorkers attempt to clear a drainage that was clogged from a flash flood September 12, 2013 in Boulder, Colorado. An estimated 6-10 inches of rain fell in 12-18 hours and more is expected throughout the day. Flash flood sirens warned people to stay away from Boulder Creek and seek higher ground.
5,250 gallons of crude oil has spilled from two tank batteries in to the South Platte River south of Milliken.

The spill from a damaged tank was reported to the Colorado Department of Natural Resources Wednesday afternoon by Anadarko Petroleum, the company responsible for the spill.

Nearly 1,900 oil and gas wells in flooded areas of Colorado are shut, and 600 workers are inspecting and repairing sites, according to the Colorado Oil and Gas Association.

Anadarko, the second-largest operator in the operator in the Denver-Julesburg Basin, has shut down 250 tank batteries and 670 wells.

In a statement, Anadarko said: "To date, we are aware of two tank batteries that were damaged by flood waters, and have associated light-oil releases. The releases occurred in flood waters associated with the South Platte River and the St. Vrain River, and we have reported them to the Colorado Oil and Gas Conservation Commission, the National Response Center, the U.S. Environmental Protection Agency and the Colorado Department of Public Health and Environment.....We are actively working under the oversight of these agencies to contain and clean up the releases to the greatest extent possible. We will continue to provide additional information as appropriate."[1]

A group called East Boulder County United, who has witnessed flood damage first hand in Colorado, are reporting that fracking chemicals have been released into the water.

In addition to dozens of oil wells and tankers to be spilled, at least one oil and gas industry pipeline had broken and was leaking into the South Platte, according to Weld County authorities.

Sources: [1] 5,250 gallons of oil spills into South Platte River - The Denver Post