2030 Plan - Grand Strand Water and Sewer Authority

d. Aquifer Storage and Recovery (ASR) Wells
GSWSA is a national leader in the development of
ASR technology. This technology allows storing
treated surface water in wells during off peak periods
for use during emergencies or peak consumption
conditions. Currently 15 ASR wells are in operation
or under development with a combined storage
volume of nearly two (2) billion gallons. Treated
water can be withdrawn for use from ASR wells at a
rate of 12 MGD.
e. Marion System
Marion is served by 8 wells with a total capacity of 6
MGD. Average daily flow is 1.2 MGD and peak day
is 1.6 MGD.
f. Transmission, Distribution, and Storage
Water is distributed to most sections of Horry County through a combination of large
diameter transmission mains and smaller distribution lines. Plant treated water is stored
in reservoirs and pumped through large diameter pipelines to three areas of the county for
storage and distribution. These areas are:
• West area covering western Horry County including Conway, Loris, and Aynor
• Central/North area covering east Conway including Coastal Carolina University
and Carolina Forest
• South area covering the south strand beaches and Socastee.
Since the service area covers so many miles, the system is equipped with major pumping
stations at the plant and reservoirs and re-pumping stations to boost the pressure in the
remote portions of the distribution system. Water is stored to meet the peak diurnal
demands in ground storage reservoirs, elevated storage tanks, and ASR wells.
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