Urban Resources wants to extract about another 75,000 cubic metres of sand. Urban Resources wants to extract about another 75,000 cubic metres of sand. Credit: Urban ResourcesA sand extraction company has won approval to expand its operations in Ravenswood. According to its website, Urban Resources operates quarries around the metropolitan area and supplies raw materials to the building and construction industry. These include clean fill sand for urban development and processed sands including lawn, bricklaying, plaster, washed white sand, concrete sand and river sand.