Opcmia Local 300

Operative Plasterers and Cement Masons Local 300, covering 46 Counties in Northern California. Learn more on how to become a Cement Mason or Plasterer!!

OPCMIA Local 300 covers the following 46 counties: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Kings, Lake, Lassen, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Monterey, Napa, Nevada, Placer, Plumas, Sacramento, San Benito, San Francisco, San Joaquin, San Mateo, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Son  ...