In 2015, Roaring Fork Conservancy (RFC), with funding from Garfield County, embarked on an extensive study to better understand water quality impairments on Cattle Creek. Based on macroinvertebrate data, a 14.5-mile segment of Cattle Creek, from Bowers Gulch (near CC1) to the confluence with the Roaring Fork River (CC7) was placed on Colorado’s 303(d) list for impaired waters.* Study goals included addressing the 303(d) listing and understanding the transition from high water quality near the headwaters to impaired water quality in the lower reach. In 2015, RFC collected and assessed chemical and biological data, conducted a land use analysis, and published results in the Cattle Creek 2015 Stream Health Evaluation.

Based on the 2015 findings, RFC has continued monitoring from 2016 through 2019 with funding from Garfield and Eagle Counties. All monitoring is strategically designed to complement and enhance the original data and provide additional information attuned to state standards. Results from five years of study have informed RFC’s initiative to address Cattle Creek’s 303(d) listing, and provided a broader understanding of overall creek health and potential impacts to aquatic life.