Dutra Materials is a major supplier of aggregate in Northern California with a strategically located quarry in San Rafael and material distribution centers scattered across the San Francisco Bay and Sacramento-San Joaquin Delta region.

The San Rafael Rock Quarry has been actively mined for over 100 years. Dutra Materials has an experienced and highly skilled staff that includes geologists as well as mining and civil engineers, all with extensive experience in the aggregate industry. Dutra Materials produces a wide variety of products, most of which are available for delivery to both waterside and land-side sites.