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 describe current conditions, evaluate flood risk, develop alternatives to reduce damages, and support coordinated floodplain management and land‑use decisions.

The following tasks are a part of this overall study:

• Summarize watershed characteristics and drainage system.
• Explain planning tasks at a high level.
• Share non‑technical hydrology context.
• Provide meeting updates and public documents.
• Gather and review existing data, prior reports, and flood history.
• Field reconnaissance of drainage facilities and conditions.
• Define watershed/sub‑watershed boundaries consistent with MHFD guidance.
• Hydrologic modeling for existing and future conditions.
• Develop and compare improvement alternatives.
• Document findings in a baseline hydrology report and concept level materials.