HELIX Environmental Planning (HELIX) prepared an Environmental Impact Report (EIR) for the expansion of Boca Quarry near the City of Truckee in Nevada County. The project proposes to expand existing mining operations, which would increase the existing extraction area of approximately 40 acres to an extraction area of approximately 158 acres on the 230-acre site. The project also includes the development of an expanded reclamation plan. HELIX also completed the visual impact assessment, greenhouse gas (GHG) and noise analyses for the EIR. In addition, HELIX was responsible for biological and cultural resources assessments for improvements to Stampede Meadows Road that were proposed to address site distance and bicycle safety issues.