Downtown Airspace Development Capacity Study (DADCS)

In 2007, new airspace protection mapping was undertaken by the City of San José which placed height limitations on allowable development surrounding Mineta San José International Airport (SJC) in order to minimize impacts to airline service.  The airspace protection mapping consisted of a combination of the lowest critical One-Engine Inoperative (OEI) and United States Terminal Instrument Procedures (TERPS) airspace protection surfaces. However, due to the changing environment in aviation operations as well as the need and desire for future building development in the City of San Jose, a new study was undertaken to assess the existing conditions and future needs of the Airport and the development community.  In February 2018, a comprehensive study referred to as the Downtown Airspace Development Capacity Study (Project DADCS) was initiated over and spanned a thirteen-month period.  The City of San José along with the consultant project team of Landrum & Brown (L&B), Jones Lang LaSalle (JLL) and Flight Engineering, LLC., assessed the impacts of increased airspace protection heights for SJC and the tradeoffs between increasing allowable building development heights and the impacts to aviation departure operations from Runways 12L and 12R at SJC. 

The study consisted of a comprehensive evaluation of the following metrics which will be described in extensive detail in this report: 

  • Existing conditions assessment for SJC aircraft operations
  • Existing real estate and land use environment in the Downtown Core and Diridon Station
  • Creation and evaluation of various airspace protection surface scenarios
  • Aircraft performance and range capability assessment of existing and future destinations served from SJC
  • Evaluation of aviation and real estate impacts associated with each of the airspace protection scenarios.  

This final report is a compilation of the various technical memorandums and studies that were assessed by the project team during the thirteen-month period.  
On March 12, 2019 the City of San José City Council approved a new policy on airspace surface protection heights in the Downtown Core and Diridon Station areas.  The new airspace protection surfaces provide additional development height opportunities within the Downtown Core and Diridon Station which will be described in detail in this report.

[Downtown Airspace Development Capacity Study (DADCS)]