Watershed Existing Conditions Technical Study

As the first step in the development of Watershed Action Plans, the purpose of the existing conditions study is to integrate information on watershed characteristics such as natural resources, creek hydrology, water quality, cultural resources, urban infrastructure management, land use, and jurisdictional policies.  Based on existing policy documents, research studies, and technical documents, the study also analyzes how historical activities, including land development, have contributed to current conditions, and identifies any critical information gaps. 

In October 2004, Questa Engineering was hired to prepare the Watershed Existing Conditions Technical Study for the Arroyo Burro, Mission and Sycamore Creek watersheds.  The study was expanded in 2005 to include the Laguna Watershed.

Click here to view the draft executive summary of the report.  The full report, which is approximately 300 pages, includes a number of maps.  Below are maps that relate to sections one, three, and four.

Individual Maps & Figures:

Introductrion
Fig. 1-1:   Study Area Locator Map
Fig. 1-2:   Political Jurisdiction
Fig. 1-3:   Subwatersheds and Management Reaches
Fig. 1-4:   Creek Names and Reaches
Fig. 1-5:   Watershed and Subwatershed Names

Land Use, Cultural Resources, and Infrastructure
Fig. 3-1:   Land Use and Land Cover
Fig. 3-2:   Neighborhoods
Fig. 3-3:   Impervious Surfaces
Fig. 3-4:   Population Density
Fig. 3-5:   City and County Zoning
Fig. 3-6:   City and County Parks
Fig. 3-7:   Paved Road Density

Citywide Watershed Conditions
Fig. 4-1:   Geology and  Geology Legend
Fig. 4-2:   Soils and Soils Legend
Fig. 4-3:   Landslides
Fig. 4-4:   Landforms
Fig. 4-5:   Sedimentation
Fig. 4-6:   Vertical Drops
Fig. 4-7:   Bed Mobility Potential
Fig. 4-8:   Bank Erosion
Fig. 4-9:   Bank Modification
Fig. 4-10: FEMA 100-year Floodplain
Fig. 4-11: Groundwater Basins
Fig. 4-12: Terrestrial Vegetation