Issue26
trends inautomation
Synergies
22
–
23
upgrade, partageandpartbecause the
areahadsuffered fromaflooding
problem,”Bensteadadds. “Theequipment
ismuchbigger,more reliable, easier to
control andwecannowpumpup to1000
litresasecond.”
MaraisStreampumpingstationwas
originallybuilt in1938and requiredan
upgrade toallowan increasedvolumeof
water tobecollectedanddelivered to the
nearbywater treatmentworkswith less
going towaste.
Geomarine, a local civil engineering
contractor,wascontractedbyGuernsey
Water tocarryout these improvement
MaraisStreamflowing
into thepumpingstation.
worksaspartofon-goingworkson the
island’s infrastructure.Before theproject
wasstartedall thatwasonsitewasa
holding tankandpumphouse.
MaraisStreamcollects the run-offwater
from the local areaand this is fedvia the
three inletpenstocks throughfinescreens
that removedebris thatwoulddamage the
pumps in thepumpingstation. Thewater is
thenpumpedeither into the treatment
worksor, in thecaseofheavy rainfall such
asearlier thisyear, canbedivertedand
dischargedstraight into thesea.
Multifunctional system
Thepumpingstation is thefirston the
Islandwhichcouldbeconsidered
‘multifunctional’, as it incorporates three
vital elements. Firstly, rawwater (rainfall)
iscaughtand transferred intoLongue
Hougue reservoir for conversion into
drinkingwater.Secondly, streamwater is
used tomaintain thecleanlinessof the
screensat thenewBelleGreveWastewater
TreatmentCentre. Finally, thenew
pumpingstationenablesexcesswater to
bepumpedout tosea,whichmight
otherwiseoverload thecapacityof the
Barker’sQuarryReservoirand lead to
localisedflooding.
