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EXECUTIVE SUMMARY In 2016, out of a desire to "minimize future land-use conflicts by providing clarity to property owners and the City on issues related to slope and ridgeline setbacks" consistent with Measure PP restrictions, the City Council adopted Southeast Hills Mapping as a Work Plan Priority. The Southeast Hills, comprising approximately 1,520 acres located within and outside City limits (see Exhibit B, Project Location Map), is a landform that functions as an open space boundary and important visual feature to the southeast of the developed portion of the City. Although the Southeast Hills have a long history of livestock grazing, they have been subject to limited development, contain large expanses of native vegetation, and serve as a wildlife corridor between Pleasanton Ridge Regional Park and the wildlands around Del Valle Regional Park. In response to the interest of limiting "growth and the impact it has on ridgelines and hillsides", Pleasanton voters in November 2008 passed Measure PP, the "Save Pleasanton's Hills and Housing Cap Initiative" (see Exhibit A, text of Measure PP). Measure PP states in part that: "No grading to construct residential or commercial structures shall occur on hillside slopes 25 percent or greater, or within 100 vertical feet of a ridgeline." Measure PP issues (including definition of key terms in the measure) were at the forefront of discussions related to the Lund Ranch II Project, which was approved on January 5, 2016, and was followed by a referendum (Measure K) seeking to halt the project. Measure K was approved, meaning that the Lund Ranch II project was able to proceed as approved. The methodology and mapping presented in this report comprise the mapping requested by City Council. Staff acknowledges that due to the language of Measure PP there are multiple ways of approaching the mapping, but believes that the mapping presented in this report employs reasonable and replicable means of defining slopes, ridgelines, and vertical ridgeline setbacks, resulting in mapping of Measure PP provisions that is consistent with the intent that "Ridgelines and hillsides shall be protected." BACKGROUND/HISTORY With the stated purpose to "...protect our city from uncontrolled growth and the impact it has on ridgelines and hillsides, traffic, schools, water supply, and our overall quality of life," Pleasanton voters in November 2008 passed Measure PP, the "Save Pleasanton's Hills and Housing Cap Initiative."1 Measure PP resulted in the addition of Land Use Element Program 21.3 to the General Plan, which reads: Program 21.3: Ridgelines and hillsides shall be protected. Housing units and structures shall not be placed on slopes of 25 percent or greater, or within 100 vertical feet of a ridgeline. No grading to construct residential or commercial structures shall occur on hillside slopes 25 percent or greater, or within 100 vertical feet of a ridgeline. Exempt from this policy are housing developments of 10 or fewer housing units on a single property. Splitting dividing, or subdividing a "legal parcel" to approve more than 10 housing units is not allowed (Measure PP, Nov. 2008). After Measure PP qualified for the ballot, the City Council commissioned a report about the effects of the initiative, which noted that some key terms in the initiative, including "structure", "ridgeline" and "slope" were not specifically defined. The ballot materials submitted to the voters ' The provisions of Measure PP related to the City's Housing Cap were invalidated by the Alameda County Superior Court as being in conflict with State law mandating that communities meet regional housing requirements. Mapping of Southeast Hills Planning Commission Page 2 of 10