MARINE NOTICE, No 121 of 2013
Limerick to Ardnacrusha Locks
Waterways Ireland wishes to advise masters and owners that they should NOT undertake a passage on the Limerick to Ardnacrusha stretch of the Shannon Navigation if the output from the Ardnacrusha hydroelectric power station is above 20 Megawatts due to high flow rates and water turbulence in the navigation. Note that 20 Megawatts is equivalent to the output from one turbine at Ardnacrusha.
Megawatt output can be ascertained in real time by phoning ++353(0)87-6477229.Should this number not be available, or for any other information re. your passage plan through Ardnacrusha Locks then please contact Ardnacrusha at ++353(0)87-9970131.
Charles Lawn, Lt Cdr (rtd), Inspector of Navigation, 18 Oct 2013