The following is an announcement from the San Rafael Rock Quarry. Annually, the Rock Quarry opens its doors to the community to provide insight to the operations of the quarry and an opportunity to see, close up, the scope of the quarry site. Meet the quarry owners and operators and take a tour of the property, including the quarry mining pit. You will need to RSVP by September 28 to insure your space at this event.