On March 1st, the California Geological Survey (CGS) released information forecasting a continuing shortage of permitted aggregate resources (sand, gravel and crushed stone) in California.  According to CGS’s Map Sheet 52 and accompanying report, California only has permitted resources to meet approximately one-third of aggregate demand over the next 50 years.

Aggregate is essential for commodities such as Portland Cement Concrete, asphaltic concrete, plaster and stucco, which means a shortage may affect California’s ability to provide for new construction projects and infrastructure.  Further, transporting aggregate from farther distances results in increased environmental impacts such as GHG emissions, air pollution and traffic congestion.

For more information, see Map Sheet 52 and the accompanying report, Aggregate Sustainability in California.