ESB Portumna Dewatering
DPS were approached by ESBI to Tender for this Project in early 2011.
At that point there were three pumphouses along the western shoreline of the River Shannon at Portumna, Co. Galway, which drained water from the low-lying lands adjacent to the river.
The contract included Design, Supply and Installation services of both Mechanical and Electrical equipment.
Phase one was to provide a full electrical upgrade to the three pumping stations. R&R Engineering were sub-contracted by DPS to design the control panels for the pumps and general distribution on each site.
Phase two involved completely removing the old pump unit from Meelick. The pumps had been in use since the 1930’s when they had been installed by a German contractor. DPS decided to go with the KSB Amacan range of pumps as a suitable replacement which required installation into a Canister fabrication. DPS sub-contracted AED metal fabrications to roll a 1000mm tube from 10mm steel which was then fabricated into the finished Canister with an outlet flange of 1200mm PN10 and finished in marine epoxy paint.
The KSB pump selected was an Amacan PA4 1000-700/ 90 10UTG1 with a Flowrate of 1880 l/s at a head of 2.4 meters. The pump unit was designed, fabricated and tested in Halle, Germany, on a lead time of 8–10 weeks. The Amacan is an axial flow pump designed to move large volumes of water over a low head application. The pump units measured 2.8m in height and weighted 2010kg.
Phase three of the works involved upgrading the old pump unit at Boula pumping station which had also been installed back in the 1930’s. A similar arrangement to that installed at Meelick was offered as a solution, supplied and installed during the summer of 2012. As part of a larger project ongoing project, DPS where asked to help with the design of two new pump houses in the Boula and Meelick areas which will effectively double the output of the sites.
The control panels were designed and build by R&R engineering. Two smaller KSB pumps where installed at both sites along with the 800mm flap valves and their pump Canisters. These 700mm tubes where again fabricated by AED with a 800mm pn10 flange.
The two new KSB Amacan PA4 700-470/ 47 6UTG1 pumps on each site have an output of 952 l/s at 2.4m head and were also fabricated and tested by KSB in Halle, Germany. The units are 2.1m high and weigh 880kgs.
Through successful collaboration with ESB and ESBI we are now progressing to a close on this project. Following a 6 month civil build and a 3 month M+E installation final commissioning is due to take place in the summer of 2013.
Commissioning of the units brings the max output of each site to 3784 l/s. Combined with the future works to take place means that ESB have the ability to displace 11,328 l/s of water from the low lying areas of Portumna.