PB Agenda Packet 3-4-26 - Laserfiche WebLink

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33 o Wells with 100'or more surface casing become very expensive due to specialty equipment holding the borehole stable during casing installation and the expense of larger piping materials for the casing. o Deeper wells are more expensive as greater depths frequently correlate with Longer drill times. Footage prices increase with depth which coincides with those longer drill times. o Access to sites across difficult terrain and strict regulations on sedimentation during drilling can also increase prices. • Costs to maintain? o General maintenance is outside the scope of our work, but most operators will replace some of the mechanical equipment like pumps and motors in time. Should not have to replace very frequently if properly maintained. o Mineral build-up may also require well maintenance, but this can be reduced if the well is monitored and regulated appropriately. • Reliability? Failure Rates? o The strict requirements of NC DEQ help provide confidence that at the end of drawdown testing with water quality results, you have a final idea of long- term sustainability. However, any aquifer is subject to change with continued human or natural forces acting on it. o Aquifer change versus well change will vary per well. • In face of climate change? o This is going to be a site-specific discussion, but most wells in the Piedmont are going to be influenced by immediate anthropogenic forcings to a greater degree than global scale climate change.