| gptkbp:instanceOf | gptkb:hydroelectric_power_station 
 | 
                        
                            
                                | gptkbp:annualGeneration | 1,650 GWh 
 | 
                        
                            
                                | gptkbp:capacity | 1,728 MW 
 | 
                        
                            
                                | gptkbp:commissioned | 1984 
 | 
                        
                            
                                | gptkbp:constructionCost | £425 million 
 | 
                        
                            
                                | gptkbp:constructionStartYear | 1974 
 | 
                        
                            
                                | gptkbp:country | gptkb:United_Kingdom 
 | 
                        
                            
                                | gptkbp:designedBy | gptkb:Sir_William_Halcrow_&_Partners 
 | 
                        
                            
                                | gptkbp:elevation | 536 metres 
 | 
                        
                            
                                | gptkbp:emergencyStartTime | 12 seconds 
 | 
                        
                            
                                | gptkbp:fuelType | gptkb:water 
 | 
                        
                            
                                | gptkbp:gridConnection | gptkb:National_Grid_(UK) 
 | 
                        
                            
                                | gptkbp:gridFrequencyResponse | yes 
 | 
                        
                            
                                | gptkbp:hasTower | 6 
 | 
                        
                            
                                | gptkbp:hasVisitorCenter | gptkb:Electric_Mountain_Visitor_Centre 
 | 
                        
                            
                                | gptkbp:location | gptkb:Llanberis,_Gwynedd,_Wales 
 | 
                        
                            
                                | gptkbp:mainContractor | gptkb:Alfred_McAlpine 
 | 
                        
                            
                                | gptkbp:maximumSpeed | 1,728 MW 
 | 
                        
                            
                                | gptkbp:nickname | gptkb:Electric_Mountain 
 | 
                        
                            
                                | gptkbp:notableFor | one of the largest pumped-storage power stations in Europe 
 | 
                        
                            
                                | gptkbp:operatedBy | gptkb:First_Hydro_Company 
 | 
                        
                            
                                | gptkbp:ownedBy | gptkb:Engie 
 | 
                        
                            
                                | gptkbp:purpose | electricity grid balancing peak load supply
 
 | 
                        
                            
                                | gptkbp:reservoirName | gptkb:Llyn_Peris gptkb:Marchlyn_Mawr
 
 | 
                        
                            
                                | gptkbp:status | operational 
 | 
                        
                            
                                | gptkbp:tunnel | 10 miles 
 | 
                        
                            
                                | gptkbp:undergroundCaverns | yes 
 | 
                        
                            
                                | gptkbp:website | https://www.electricmountain.co.uk/ 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Llanberis gptkb:Llyn_Padarn
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Dinorwig Power Station 
 |