Syar companies have been active in the construction industry for over sixty years and Syar Industries, Inc. is now the largest producer and supplier of high quality aggregate rock products and asphaltic paving materials in the North Bay region. The corporate office is at the Napa quarry with other rock quarries at Lake Herman in Solano County and at Soledad in Monterey County. Sand and gravel processing plants are in Sonoma County along the Russian River in Healdsburg and Cache Creek in Madison in Yolo County, Asphaltic productions plants are located in Napa, Vallejo, Healdsburg, Santa Rosa and Madison, These plants are among the most technically advanced and efficient in the industry and can ship large volumes of aggregate each day to cust