Clearwater Hydrology was contracted to prepare the Hydrology and Water Quality background reports and EIR section for the Marin Countywide Plan Update 2005. The EIR document was awarded the 2008 Outstanding Environmental Analysis Document by the Association of Environmental Professionals (AEP). Site assessments were performed at specific areas designated for dense housing development to assess local hydrologic features and the relationship between the natural features and the proposed project. GIS was utilized to assess potential impacts to County resources outside the specific areas. Potential impacts to water quality or increased flooding, as required under CEQA (California Environmental Quality Act), were assessed for the entire county and a detailed impact analysis was presented. In the event that County policies did not sufficiently reduce impacts to water quality and/or flooding, CH proposed mitigation measures to reduce impacts to a less-than-significant level.

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