Complex sentence: The sand, gravel, and quarry rock from the Maury Island site would be distributed throughout the Pacific Northwest region to be used for building roadways and houses, creating concrete, and making other products such as roof tiles and cement blocks.
Split into simpler sentences: The sand, gravel, and quarry rock from the Maury Island site would be distributed throughout the Pacific Northwest region. These resources would be used for such things as building roadways and houses, mixing in concrete, and making other products such as roof tiles and cement blocks.