Aspen prepared a programmatic analysis for development of 4,500 MW of wind generation within the TWRA, as part of the TRTP EIR/EIS. The TWRA is located in Kern County. The TWRA study area was established using the Kern County Zoning Ordinance, the locations of existing transmission systems and wind farms, the CEC annual wind power density map, land uses and flight restriction zones in the area, and assistance from Kern County. A programmatic analysis was then conducted for wind development within the TWRA boundary using the Kern County Significance Criteria, the Kern County General Plan, and information from existing and proposed wind farms in the area.