About Dutra | Our History | Our Core Values | Mission Statement | Projects | Museum | Management | Locations | Affiliation | Awards | Newsletter | We Do Not Sell Your Personal Information


Dutra Materials is a key supplier of aggregate in Northern California with a strategically located quarry in San Rafael and material distribution centers scattered among the San Francisco Bay and Sacramento delta region.

The San Rafael Rock Quarry, acknowledged as a certified State and Federal resource, is unique because:

  • Water-side barge-loading equipment makes it the most cost-effective transporter of quality aggregate in the region.
  • An extensive barge and towing fleet allows it to handle any-sized job within its service area -- from projects West of the Rocky Mountains to the Pacific Rim.

The San Rafael Rock Quarry has been an active mine for over 100 years. Dutra Materials has an experienced and highly skilled staff which includes geologists as well as mining and civil engineers, all with extensive experience in the aggregate industry. Dutra Materials manufactures a wide variety of products, most of which are available for land-side or water-side distribution.

Dutra Materials products include:

  • Rip rap
  • Base rock
  • Drain rock
  • Asphalt concrete
  • Recycled aggregates
  • Fill material
  • Permeable material

Projects which have utilized Dutra's materials include:

  • Sacramento Delta levee repair projects for the U.S. Army Corps of Engineers and Department of Water Resources
  • Bay Area Rapid Transit (BART) tube, Oakland, CA
  • Peyton Slough Remediation, Martinez, CA
  • Port of Oakland/Oakland International Airport Runway
  • Stinson Beach Shoreline Restoration
  • Marin County Highway 101 Widening Project
  • Golden Gate Race Track
  • Rowland Blvd. and Hamilton Field Levee repairs, Marin County, CA
  • Bay Area schools -- sporting fields and playgrounds

Material Plants

San Rafael Rock Quarry
1000 Point San Pedro Road
San Rafael, CA 94901
(415) 258-6855

Richmond Plant
961 Stenmark Street
Richmond, CA 94801
(510) 970-7717

For Sales & Scheduling,
contact the Material office at
(415) 459-7710 or materials@dutragroup.com

For Quotes or Product Data,
visit our website at: SanRafaelRockQuarry.com

Accolades for Dutra Materials

"Having done business with the Dutra Group for over 30 years, we are proud to be in partnership with a company that not only provides excellent customer service, but has made considerable contributions to the growth of our community over the years."

Richard Ghilotti
President Ghilotti Construction Company