Idaho Springs STP - Projected Wastewater Treatment Plant in Idaho Springs, Colorado

Idaho Springs STP is a planned wastewater treatment facility located in Idaho Springs, Colorado, a small mountain community in Clear Creek County. The plant is designed to serve a population of approximately 2,500 residents, reflecting the scale of a small agglomeration typical of rural Rocky Mountain towns. As a projected facility, the treatment process and capacity details are not yet finalized. In the United States, wastewater treatment plants of this size are regulated under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Colorado Department of Public Health and Environment. These permits typically require secondary treatment as a minimum standard for municipal discharges. The plant's treated effluent will be discharged into the Clear Creek watershed, which flows into the South Platte River, a major tributary of the Platte River system. This river network ultimately drains into the Mississippi River and the Gulf of Mexico. The Clear Creek watershed supports diverse aquatic life and is an important recreational corridor for fishing and kayaking.

The plant will discharge into Clear Creek, a mountain stream that flows through the Front Range and joins the South Platte River near Denver. The South Platte then flows into the Platte River, which eventually reaches the Mississippi River and the Gulf of Mexico. The Clear Creek watershed is ecologically sensitive, supporting trout populations and other cold-water species, and is a key water source for downstream communities.