Ralston Creek is a left‑bank tributary to Clear Creek with a watershed spanning parts of Gilpin and Jefferson Counties and the City of Arvada. Major tributaries include Leyden Creek (north) and Van Bibber Creek (south). The study’s public purpose is to assess the baseline hydrologic conditions for this watershed, downstream of Blunn Reservoir.

The following tasks are a part of this overall study:

• Gather, organize and review existing hydrology data.
• Develop models for existing and future hydrologic conditions.
• Compare hydrologic model results with those of previous studies.
• Document findings in a baseline hydrology report.