How to Deep-Fry. The goal is to maintain the temperature of the oil, and adding too much food at a time will cause it to plunge. When your oil reaches the desired temperature (this depends on the food and varies with the cook, but if your recipe doesn't suggest one...mines,overlying rock is stripped away to expose the coal.In deep mines,miners must go underground to dig out the coal.M ost of the worldÕs coal is used to fuel power plants and to run factories. When coal is burned as a fuel,it releases byproducts that pollute air and water.Also,surface mining can destroy entire landscapes.Coal Spare conduits are often installed to accommodate future cable circuits, the possibility of an installed conduit becoming unusable, for ground continuity conductors or to support communication lines. Typical trenches are 2-4 feet (0.6-1.2m) wide and usually at least 4ft (1.2m) deep. 7 Figure 6: Open-cut trenching for duct bank installation If the water shut-down is for a broken sprinkler line or sprinkler head than locate the 1 st valve (closest to the main water line entry point) and operate that valve as described below. For all other general plumbing shut-offs, emergency and non-emergency: