Prior to the Dust Bowl era, agriculture in this section of the state had relied upon sources such as Boulder Creek, St. Vrain Creek, Little Thompson River, Big Thompson River and the Cache La Poudre River, all of which are a part of the South Platte River basin and flow into the South Platte River before the South Platte reaches Greeley, Colorado.
The low pH level and the heavy metal contamination from the mine have caused the virtual elimination of aquatic life in sections of Slickrock Creek, Boulder Creek, and Spring Creek.
Penny Singer was the second wife of microbiologist Christopher Hills, who was co-discoverer of the protein-rich plankton spirulina, the base for many natural food products, and founded the University of the Trees in Boulder Creek, California.
Commuter trains fed the San Francisco ferries from east bay communities, two daily trains served Santa Cruz, and four daily locals served the logging branch to Boulder Creek.
A plaque in the sitting area along the Boulder Creek Path near 17th Street contains a dedication to Osborne for her years of work as a city planner.
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At Boulder it receives Boulder Creek and turns south again.