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64 <br /> Commissioner Questions cont. <br /> • Costs to drill? <br /> • This can vary widely, but the major expenses in drilling are the surface casing, well <br /> diameter, and depth requirements. <br /> • Wells with 1 00' or more surface casing become very expensive due to specialty <br /> equipment holding the borehole stable during casing installation and the expense of <br /> larger piping materials for the casing. <br /> • Deeper wells are more expensive as greater depths frequently correlate with longer drill <br /> times. Footage prices increase with depth which coincides with those longer drib times. <br /> • Access to sites across difficult terrain and strict regulations on sedimentation during <br /> drilling can also increase prices. <br /> • Costs to maintain? <br /> • General maintenance is outside the scope of our work, but most operators will replace <br /> some of the mechanical equipment like pumps and motors in time. Should not have to <br /> replace very frequently if properly maintained. <br /> • Mineral build-up may also require well maintenance, but this can be reduced if the well <br /> is monitored and regulated appropriately. <br />