In 2015, Roaring Fork Conservancy (RFC), with funding from Garfield County, embarked on an extensive study to better understand water quality impairment(s) on Cattle Creek. Based on previous macroinvertebrate data, a 14.5-mile segment of Cattle Creek, from Bowers Gulch to the confluence with the Roaring Fork River was listed on Colorado’s 303(d) list. Based on previous data, Cattle Creek exhibits high water quality near the headwaters and impaired water quality in the lower reach. With this information, RFC worked with property owners to gain access to strategic areas in and along Cattle Creek to understand what is happening in between these two sites. Through the summer and fall of 2015, RFC collected and assessed chemical and biological water quality data based on Colorado State Standards at seven sites along Cattle Creek to provide insight into the source of any water quality impairment(s).