Impervious Surface Data Santa Clara Valley Urban Runoff Pollution Prevention Program (SCVURPPP) April 2002 – August 2003 Sue Ma Water Resource Control Engineer October 10, 2005
Impervious Surface Data • Time period for data: April 2002 - August 2003 • Shorter time period (July 2002 - June 2003) for San Jose, Santa Clara, and Los Altos Hills data • City of Mountain View did not participate • San Jose and Santa Clara did not collect single-family residential data for Small Projects • Forms used for data collection not uniform • Data might not be “ground-truthed”
Project CategoriesBased on Area of New/Replaced Impervious Surface • Group 1 Projects > 1 acre • Group 2 Projects > 10,000 ft2 & < 1 acre • Small Projects < 10,000 ft2
SCVURPPP Total New/Replaced Impervious Surface216.9 AcresApril 2002 – August 2003 • Data represents all municipalities in SCVURPPP except Mountain View and single-family Small Projects in San Jose and Santa Clara (city).
SCVURPPP Total New/Replaced Impervious Surface61.6 AcresApril 2002 – August 2003 * Data represents all municipalities in SCVURPPP except Cities of Mountain View, San Jose, and Santa Clara.