Development is a continual process that improves the well yield and clarity with time. The length of time to develop a well depends on many factors, including the method – percussion, augering, jetting, mud rotary, etc. Well development is the process of restoring the formation to the pre-drilling conditions – which is the ideal condition. If the compaction can be relieved, if the smearing can be removed and the fines adjacent to the well bore removed, the well will achieve near 100 percent efficiency and development. Other factors include the physical nature of the formation itself. Poorly sorted, fine-grained materials take much longer than well-sorted granular sediments. The size of the screen slots compared to the size of the grains adjacent to the screen is an important factor. If a large percentage of the grains (clays and silts) near the borehole will fit through the screen slots, the well will take longer to develop. Ideally, the amount of material that settles out of the development water in a 5-gallon bucket should be less than a teaspoon per gallon.