Hidden Canyon Residences and Preserve Project

The Hidden Canyon Residences and Preserve project is a residential development led by the City of Pleasanton involving the construction of 28 new detached single-family homes and associated roadways on approximately 23.89 acres of a 130.98-acre site. The scope of work includes the demolition and reconstruction of two existing homes, site preparation, grading, building construction scheduled through 2028, paving, and architectural coating. A significant component of the project is the preservation of over 117 acres as open space, which includes the annexation of a portion of the site, such as the existing Oak Hills Congregation Church Site, into the City of Pleasanton to reorganize city boundaries. The development must comply with various standards, including the CALGreen Code, Pleasanton Municipal Code Chapter 17.50, LEED Neighborhood requirements, and state water-efficient landscape ordinances. The project is subject to extensive environmental oversight and technical requirements as detailed in its Draft Environmental Impact Report. Key areas of focus include air quality, greenhouse gas emissions, biological resources, hydrology, and transportation impacts. Technical assessments have addressed soil contamination concerns from prior agricultural use, hydraulic modeling for water pressure and fire flow capabilities, and geotechnical stability regarding geologic hazards. Specialized personnel are required for compliance, including a qualified paleontologist to monitor grading operations and a historical resources consultant to evaluate cultural assets. Additionally, the project must adhere to Cal/OSHA workplace safety regulations and AB 52 confidentiality requirements regarding tribal cultural resources. Transportation studies have identified impacts on vehicle miles traveled, suggesting the need for mitigation strategies such as Transportation Demand Management programs.