Gravel is a mixture of rock and sand. Gravel is an excellent choice for fill, under driveways (concrete, paving stones, asphalt, grade beams etc. sidewalks, pathways, parking lots, roadways) .Why is base gravel used instead of screening? Because base gravel contains clay or what is called a binder to give better compaction to your paving project. Call us today for gravel base projects for parking lots and yards in Calgary, Red Deer and Edmonton Area. We can do grading and levelling the lots and also supply, install and compact the base and sub-base with all kinds of gravel such as: pit run, road crush, recycled asphalt or recycled concrete etc.