Location:
Cashiers, North Carolina
Details:
Altamont performed a well capacity test for a water well in Cashiers, North Carolina to determine its optimal long-term capacity. Work was performed for Jackson County to help the county determine the viability of purchasing the well. The water well was classified as a non-transient, non-community (NTNC) water supply system and served a county public library, a charter school, a U.S. post office, and one residence. The well capacity test consisted of a step-drawdown test to estimate the specific yield of the well, followed by a 72-hour constant rate pumping test to demonstrate the long-term capacity of the well. Pumping rates for the step-drawdown test ranged from 20 gallons per minute (gpm) to 102 gpm. The 72-hour pumping test maintained a flow rate of 100 gpm. The drawdown was monitored with both an electronic water level meter and an In-Situ® datalogger. The flow rate was measured with a properly calibrated gauge and manually, by filling a vessel of known volume. The pumped water was discharged toward a low-lying area, which drained into a downstream reservoir. Erosion control measures were used to minimize scouring and downstream sedimentation. The aboveground plumbing system included an in-line 5,000-gallon tank designed for potable water use to ensure that service to the water users was not disrupted. The majority of the 72-hour pumping test was performed over the weekend to minimize the impact of the work to the Cashiers community.
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