Island Excavating has been serving the San Juan Islands since 1970. We are extremely sensitive to our clients land needs, and take great care to preserve the natural vegetation and landscape. sland Excavating, Inc. mans and runs Dolphin Bay Quarry. Dolphin Bay Quarry is the top producer of rock products for Orcas Island. Our selection of high quality rock ranges for all sizes of crushed rock, to landscaping boulders and wall construction material.